[AutoPR azure-resourcemanager-network-generated] Add AppGw swagger changes for L4 proxy#12393

openapi-sdkautomation[bot] wants to merge 1 commit intomainAzureSDKAutomation/azure-sdk-for-java:mainfrom

sdkAuto/17561/azure-resourcemanager-network-generatedAzureSDKAutomation/azure-sdk-for-java:sdkAuto/17561/azure-resourcemanager-network-generatedCopy head branch name to clipboard