[BUG] Version 7.7.0: Generating java.net.URLEncoder.encode(String, String) instead of the preferable one java.net.URLEncoder.encode(String, Charset)

Description

Version 7.7.0:
Generating java.net.URLEncoder.encode(String, String) instead of the preferable one java.net.URLEncoder.encode(String, Charset)

Problem is when I am using org.gaul:modernizer-maven-plugin:2.7.0:modernizer (modernizer) on project it is forcing the build to fail as the generated code is not using the most preferable method signature i.e. java.net.URLEncoder.encode(String, Charset)

spring-boot-starter-parent version : 2.7.7
java version : 11
openapi-generator-maven-plugin version : 7.7.0
openapi-generator-maven-plugin version : 2.7.0
generatorName : java using with "resttemplate" library.

Error:

openapi-generator version

7.7.0

OpenAPI declaration file content or url

openapi: 3.0.1
info:
  title: Sample API
  description: A simple API example
  version: 1.0.0
paths:
  /greet:
    get:
      summary: Greet the user
      parameters:
        - name: name
          in: query
          required: true
          schema:
            type: string
      responses:
        '200':
          description: A greeting message
          content:
            application/json:
              schema:
                type: object
                properties:
                  message:
                    type: string
                    example: Hello, World!

Generation Details

                        <plugin>
				<groupId>org.openapitools</groupId>
				<artifactId>openapi-generator-maven-plugin</artifactId>
				<version>7.7.0</version>
				<executions>
					<execution>
						<id>generate</id>
						<goals>
							<goal>generate</goal>
						</goals>
						<phase>generate-sources</phase>
					</execution>
				</executions>
				<configuration>
					<inputSpec>
						${project.basedir}/src/main/resources/api-spec.yaml</inputSpec>
					<generatorName>java</generatorName>
					<output>
						${project.build.directory}/generated-sources/openapi</output>
					<apiPackage>com.ukb.openapi.demo.api</apiPackage>
					<modelPackage>com.ukb.openapi.demo.model</modelPackage>
					<invokerPackage>com.ukb.openapi.demo.invoker</invokerPackage>
					<groupId>com.ukb.openapi.demo</groupId>
					<artifactId>open-api-demo</artifactId>
					<artifactVersion>1.0.0</artifactVersion>
					<configOptions>
						<dateLibrary>java8</dateLibrary>
						<library>resttemplate</library>
						<withXml>false</withXml>
						<sourceDirectory>
							${project.build.directory}/generated-sources/openapi/src/main/java</sourceDirectory>
					</configOptions>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.gaul</groupId>
				<artifactId>modernizer-maven-plugin</artifactId>
				<version>2.7.0</version>
				<configuration>
					<javaVersion>11</javaVersion>
				</configuration>
				<executions>
					<execution>
						<id>modernizer</id>
						<phase>verify</phase>
						<goals>
							<goal>modernizer</goal>
						</goals>
					</execution>
				</executions>
			</plugin>

Steps to reproduce

Prepare a simple springboot project using the pom.xml and api-spec.yaml and run
mvn clean install

Error:

.zip file of the project is also included as attachment.

open-api-demo.zip

Suggest a fix

1. Generate the code with corresponding active method signature. i.e. java.net.URLEncoder.encode(String, Charset) for java 11.

Start with the pom.xml and api-spec.yaml from the reproduction project, then run mvn clean install to inspect the generated Java client and the modernizer failure. Trace the generated URL-encoding call and verify that the output uses java.net.URLEncoder.encode(String, Charset) for Java 11 and passes the modernizer check.