Need to change swagger Petstore url to https

Description:
When following doc : https://apim.docs.wso2.com/en/3.0.0/learn/design-api/create-api/create-a-rest-api-from-a-swagger-definition/

following error comes due to current example being "http".

[2021-10-28 10:24:25,805] ERROR - OASParserUtil Exception occurred while retrieving the OpenAPI definition from URL
org.apache.http.client.ClientProtocolException: null
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:867) ~[httpclient_4.3.6.wso2v2.jar:?]
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) ~[httpclient_4.3.6.wso2v2.jar:?]
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106) ~[httpclient_4.3.6.wso2v2.jar:?]
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:57) ~[httpclient_4.3.6.wso2v2.jar:?]
at org.wso2.carbon.apimgt.impl.definitions.OASParserUtil.validateAPIDefinitionByURL_aroundBody54(OASParserUtil.java:872) [org.wso2.carbon.apimgt.impl_6.5.349.jar:?]
at org.wso2.carbon.apimgt.impl.definitions.OASParserUtil.validateAPIDefinitionByURL(OASParserUtil.java:864) [org.wso2.carbon.apimgt.impl_6.5.349.jar:?]
at org.wso2.carbon.apimgt.rest.api.publisher.v1.impl.ApisApiServiceImpl.validateOpenAPIDefinition(ApisApiServiceImpl.java:3593) [classes/:?]
at org.wso2.carbon.apimgt.rest.api.publisher.v1.impl.ApisApiServiceImpl.validateOpenAPIDefinition(ApisApiServiceImpl.java:2842) [classes/:?]
at org.wso2.carbon.apimgt.rest.api.publisher.v1.ApisApi.validateOpenAPIDefinition(ApisApi.java:1044) [classes/:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_261]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_261]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_261]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_261]
at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:179) [cxf-core-3.2.8.jar:3.2.8]
at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96) [cxf-core-3.2.8.jar:3.2.8]
at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:193) [cxf-rt-frontend-jaxrs-3.2.8.jar:3.2.8]
at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:103) [cxf-rt-frontend-jaxrs-3.2.8.jar:3.2.8]
at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:59) [cxf-core-3.2.8.jar:3.2.8]
at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:96) [cxf-core-3.2.8.jar:3.2.8]
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308) [cxf-core-3.2.8.jar:3.2.8]
at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121) [cxf-core-3.2.8.jar:3.2.8]
at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:267) [cxf-rt-transports-http-3.2.8.jar:3.2.8]
at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:234) [cxf-rt-transports-http-3.2.8.jar:3.2.8]
at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:208) [cxf-rt-transports-http-3.2.8.jar:3.2.8]
at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:160) [cxf-rt-transports-http-3.2.8.jar:3.2.8]
at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:216) [cxf-rt-transports-http-3.2.8.jar:3.2.8]
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:301) [cxf-rt-transports-http-3.2.8.jar:3.2.8]
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doPost(AbstractHTTPServlet.java:220) [cxf-rt-transports-http-3.2.8.jar:3.2.8]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:681) [tomcat-servlet-api_9.0.22.wso2v1.jar:?]
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:276) [cxf-rt-transports-http-3.2.8.jar:3.2.8]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat_9.0.22.wso2v1.jar:?]
at org.wso2.carbon.identity.context.rewrite.valve.TenantContextRewriteValve.invoke(TenantContextRewriteValve.java:80) [org.wso2.carbon.identity.context.rewrite.valve_1.3.6.jar:?]
at org.wso2.carbon.identity.authz.valve.AuthorizationValve.invoke(AuthorizationValve.java:100) [org.wso2.carbon.identity.authz.valve_1.3.6.jar:?]
at org.wso2.carbon.identity.auth.valve.AuthenticationValve.invoke(AuthenticationValve.java:74) [org.wso2.carbon.identity.auth.valve_1.3.6.jar:?]
at org.wso2.carbon.tomcat.ext.valves.CompositeValve.continueInvocation(CompositeValve.java:99) [org.wso2.carbon.tomcat.ext_4.5.1.jar:?]
at org.wso2.carbon.tomcat.ext.valves.TomcatValveContainer.invokeValves(TomcatValveContainer.java:49) [org.wso2.carbon.tomcat.ext_4.5.1.jar:?]
at org.wso2.carbon.tomcat.ext.valves.CompositeValve.invoke(CompositeValve.java:62) [org.wso2.carbon.tomcat.ext_4.5.1.jar:?]
at org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:145) [org.wso2.carbon.tomcat.ext_4.5.1.jar:?]
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687) [tomcat_9.0.22.wso2v1.jar:?]
at org.wso2.carbon.tomcat.ext.valves.CarbonContextCreatorValve.invoke(CarbonContextCreatorValve.java:57) [org.wso2.carbon.tomcat.ext_4.5.1.jar:?]
at org.wso2.carbon.tomcat.ext.valves.RequestCorrelationIdValve.invoke(RequestCorrelationIdValve.java:116) [org.wso2.carbon.tomcat.ext_4.5.1.jar:?]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1726) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) [tomcat_9.0.22.wso2v1.jar:?]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat_9.0.22.wso2v1.jar:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_261]
Caused by: org.apache.http.HttpException: Scheme 'https' not registered.
at org.apache.http.impl.conn.DefaultHttpRoutePlanner.determineRoute(DefaultHttpRoutePlanner.java:109) ~[httpclient_4.3.6.wso2v2.jar:?]
at org.apache.http.impl.client.DefaultRequestDirector.determineRoute(DefaultRequestDirector.java:762) ~[httpclient_4.3.6.wso2v2.jar:?]
at org.apache.http.impl.client.DefaultRequestDirector.handleResponse(DefaultRequestDirector.java:1108) ~[httpclient_4.3.6.wso2v2.jar:?]
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:515) ~[httpclient_4.3.6.wso2v2.jar:?]
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863) ~[httpclient_4.3.6.wso2v2.jar:?]
... 60 more

Hence, need to use "https://petstore.swagger.io/v2/swagger.json" in the sample url value.

Open the linked API creation documentation page and locate the sample Petstore Swagger URL. Change the sample from HTTP to the HTTPS URL specified in the issue, then verify that the example displays the updated URL and can be followed without the reported error.