build(grpc): upgrade protobuf-maven-plugin to 5.1.7#994

ehsavoie merged 1 commit into

a2aproject:maina2aproject/a2a-java:mainfrom

ehsavoie:protobuf-maven-plugin-upgradeehsavoie/a2a-java:protobuf-maven-plugin-upgradeCopy head branch name to clipboard