Add code owners for Azure Communication Services
/sdk/batch/ @bgklein @xingwu1
/sdk/cognitiveservices/azure-cognitiveservices-vision-customvision/ @areddish
+# PRLabel: %Communication
+/sdk/communication/ @RezaJooyandeh @turalf
+
# PRLabel: %KeyVault
/sdk/keyvault/ @schaabs @chlowell @iscai-msft
