Microsoft.Web - swagger is missing property `http20ProxyFlag`

same to: https://github.com/Azure/azure-rest-api-specs/issues/22876

The property is available in the request payload but not present in the swagger:https://github.com/Azure/azure-rest-api-specs/blob/main/specification/web/resource-manager/Microsoft.Web/stable/2022-09-01/CommonDefinitions.json#L3097

```
{
"id": "/subscriptions/xxx/resourceGroups/testRG-lwa-ip/providers/Microsoft.Web/sites/testLWA-ip",
"name": "testLWA-ip",
"type": "Microsoft.Web/sites",
"kind": "app,linux",
"location": "East US",
"tags": {},
"properties": {
"name": "testLWA-ip",
"state": "Running",
"hostNames": [
"testlwa-ip.azurewebsites.net"
],
"webSpace": "testRG-lwa-ip-EastUSwebspace-Linux",
"selfLink": "https://waws-prod-blu-489.api.azurewebsites.windows.net:454/subscriptions/xxx/webspaces/testRG-lwa-ip-EastUSwebspace-Linux/sites/testLWA-ip",
"repositorySiteName": "testLWA-ip",
"owner": null,
"usageState": "Normal",
"enabled": true,
"adminEnabled": true,
"enabledHostNames": [
"testlwa-ip.azurewebsites.net",
"testlwa-ip.scm.azurewebsites.net"
],
"siteProperties": {
"metadata": null,
"properties": [
{
"name": "LinuxFxVersion",
"value": ""
},
{
"name": "WindowsFxVersion",
"value": null
}
],
"appSettings": null
},
"availabilityState": "Normal",
"sslCertificates": null,
"csrs": [],
"cers": null,
"siteMode": null,
"hostNameSslStates": [
{
"name": "testlwa-ip.azurewebsites.net",
"sslState": "Disabled",
"ipBasedSslResult": null,
"virtualIP": null,
"thumbprint": null,
"certificateResourceId": null,
"toUpdate": null,
"toUpdateIpBasedSsl": null,
"ipBasedSslState": "NotConfigured",
"hostType": "Standard"
},
{
"name": "testlwa-ip.scm.azurewebsites.net",
"sslState": "Disabled",
"ipBasedSslResult": null,
"virtualIP": null,
"thumbprint": null,
"certificateResourceId": null,
"toUpdate": null,
"toUpdateIpBasedSsl": null,
"ipBasedSslState": "NotConfigured",
"hostType": "Repository"
}
],
"computeMode": null,
"serverFarm": null,
"serverFarmId": "/subscriptions/xxx/resourceGroups/test-lwa-ip/providers/Microsoft.Web/serverfarms/testASP-linux",
"reserved": true,
"isXenon": false,
"hyperV": false,
"lastModifiedTimeUtc": "2023-07-25T03:31:23.4566667",
"storageRecoveryDefaultState": "Running",
"contentAvailabilityState": "Normal",
"runtimeAvailabilityState": "Normal",
"dnsConfiguration": {},
"vnetRouteAllEnabled": false,
"containerAllocationSubnet": null,
"useContainerLocalhostBindings": null,
"vnetImagePullEnabled": false,
"vnetContentShareEnabled": false,
"siteConfig": {
"numberOfWorkers": 1,
"defaultDocuments": null,
"netFrameworkVersion": null,
"phpVersion": null,
"pythonVersion": null,
"nodeVersion": null,
"powerShellVersion": null,
"linuxFxVersion": "",
"windowsFxVersion": null,
"windowsConfiguredStacks": null,
"requestTracingEnabled": null,
"remoteDebuggingEnabled": null,
"remoteDebuggingVersion": null,
"httpLoggingEnabled": null,
"azureMonitorLogCategories": null,
"acrUseManagedIdentityCreds": false,
"acrUserManagedIdentityID": null,
"logsDirectorySizeLimit": null,
"detailedErrorLoggingEnabled": null,
"publishingUsername": null,
"publishingPassword": null,
"appSettings": null,
"metadata": null,
"connectionStrings": null,
"machineKey": null,
"handlerMappings": null,
"documentRoot": null,
"scmType": null,
"use32BitWorkerProcess": null,
"webSocketsEnabled": null,
"alwaysOn": true,
"javaVersion": null,
"javaContainer": null,
"javaContainerVersion": null,
"appCommandLine": null,
"managedPipelineMode": null,
"virtualApplications": null,
"winAuthAdminState": null,
"winAuthTenantState": null,
"customAppPoolIdentityAdminState": null,
"customAppPoolIdentityTenantState": null,
"runtimeADUser": null,
"runtimeADUserPassword": null,
"loadBalancing": null,
"routingRules": null,
"experiments": null,
"limits": null,
"autoHealEnabled": null,
"autoHealRules": null,
"tracingOptions": null,
"vnetName": null,
"vnetRouteAllEnabled": null,
"vnetPrivatePortsCount": null,
"publicNetworkAccess": null,
"cors": null,
"push": null,
"apiDefinition": null,
"apiManagementConfig": null,
"autoSwapSlotName": null,
"localMySqlEnabled": null,
"managedServiceIdentityId": null,
"xManagedServiceIdentityId": null,
"keyVaultReferenceIdentity": null,
"ipSecurityRestrictions": null,
"ipSecurityRestrictionsDefaultAction": null,
"scmIpSecurityRestrictions": null,
"scmIpSecurityRestrictionsDefaultAction": null,
"scmIpSecurityRestrictionsUseMain": null,
"http20Enabled": false,
"minTlsVersion": null,
"minTlsCipherSuite": null,
"supportedTlsCipherSuites": null,
"scmMinTlsVersion": null,
"ftpsState": null,
"preWarmedInstanceCount": null,
"functionAppScaleLimit": 0,
"elasticWebAppScaleLimit": null,
"healthCheckPath": null,
"fileChangeAuditEnabled": null,
"functionsRuntimeScaleMonitoringEnabled": null,
"websiteTimeZone": null,
"minimumElasticInstanceCount": 0,
"azureStorageAccounts": null,
"http20ProxyFlag": null,
"sitePort": null,
"antivirusScanEnabled": null,
"storageType": null
},
"deploymentId": testLWA-ip",
"slotName": null,
"trafficManagerHostNames": null,
"sku": "Standard",
"scmSiteAlsoStopped": false,
"targetSwapSlot": null,
"hostingEnvironment": null,
"hostingEnvironmentProfile": null,
"clientAffinityEnabled": false,
"clientCertEnabled": false,
"clientCertMode": "Required",
"clientCertExclusionPaths": null,
"hostNamesDisabled": false,
"vnetBackupRestoreEnabled": false,
"domainVerificationIdentifiers": null,
"customDomainVerificationId": "60050EDF973F6A37580BEC6B496D6EB73503D4FFDEBC08629AB575880A1CAD2A",
"kind": "app,linux",
"managedEnvironmentId": null,
"inboundIpAddress": "20.119.8.46",
"possibleInboundIpAddresses": "20.119.8.46",
"ftpUsername": "testLWA-ip\\$testLWA-ip",
"ftpsHostName": "ftps://waws-prod-blu-489.ftp.azurewebsites.windows.net/site/wwwroot",
"outboundIpAddresses": "20.75.146.211,20.75.146.221,20.75.146.228,20.75.146.229,20.75.146.254,20.75.146.255,40.88.199.185,20.75.146.16,20.75.146.17,20.75.146.24,20.75.146.25,20.75.146.30,20.119.8.46",
"possibleOutboundIpAddresses": "20.75.146.211,20.75.146.221,20.75.146.228,20.75.146.229,20.75.146.254,20.75.146.255,40.88.199.185,20.75.146.16,20.75.146.17,20.75.146.24,20.75.146.25,20.75.146.30,20.75.146.31,20.75.146.32,20.75.146.33,20.75.146.40,20.75.146.64,20.75.146.65,20.75.149.122,20.75.146.74,40.88.194.183,20.75.146.166,20.75.146.194,20.75.146.195,20.75.146.211,20.75.146.221,20.75.146.228,20.75.146.229,20.75.146.254,20.75.146.255,20.75.147.4,20.75.147.5,20.75.147.18,20.75.147.19,20.75.147.37,20.75.147.65,20.119.8.46",
"containerSize": 0,
"dailyMemoryTimeQuota": 0,
"suspendedTill": null,
"siteDisabledReason": 0,
"functionExecutionUnitsCache": null,
"maxNumberOfWorkers": null,
"homeStamp": "waws-prod-blu-489",
"cloningInfo": null,
"hostingEnvironmentId": null,
"tags": {},
"resourceGroup": "testRG-lwa-ip",
"defaultHostName": "lwa-ip.azurewebsites.net",
"slotSwapStatus": null,
"httpsOnly": false,
"endToEndEncryptionEnabled": false,
"redundancyMode": "None",
"inProgressOperationId": null,
"geoDistributions": null,
"privateEndpointConnections": [],
"publicNetworkAccess": "Enabled",
"buildVersion": null,
"targetBuildVersion": null,
"migrationState": null,
"eligibleLogCategories": "AppServiceAppLogs,AppServiceAuditLogs,AppServiceConsoleLogs,AppServiceHTTPLogs,AppServiceIPSecAuditLogs,AppServicePlatformLogs,ScanLogs",
"inFlightFeatures": [],
"storageAccountRequired": false,
"virtualNetworkSubnetId": null,
"keyVaultReferenceIdentity": "SystemAssigned",
"defaultHostNameScope": "Global",
"privateLinkIdentifiers": null
}
}
```

Start with specification/web/resource-manager/Microsoft.Web/stable/2022-09-01/CommonDefinitions.json around line 3097 and compare the SiteConfig schema with the request payload shown in the issue. Done means the swagger definition represents the http20ProxyFlag property consistently with the payload.

Written by the indexing model from the issue text.