Use GH aliases (Azure#21017)

updated according to the [guidance](https://teams.microsoft.com/l/message/19:[email protected]/1647518325907?tenantId=72f988bf-86f1-41af-91ab-2d7cd011db47&groupId=3e17dcb0-4257-4a30-b843-77f47f1d4121&parentMessageId=1647518325907&teamName=Azure%20SDK&channelName=General&createdTime=1647518325907)

Author: petrsvihlik

.github/CODEOWNERS

@@ -41,13 +41,13 @@
 /sdk/batch/ @dpwatrous @paterasMSFT @zfengms @deyaaeldeen
 
 # PRLabel: %Communication
-/sdk/communication/communication-identity/ @Azure/acs-identity-sdk 
+/sdk/communication/communication-identity/ @Azure/acs-identity-sdk @petrsvihlik @AikoBB @maximrytych-ms @martinbarnas-ms
 /sdk/communication/communication-chat/ @LuChen-Microsoft
 /sdk/communication/communication-phone-numbers/ @miguhern @whisper6284 @lucasrsant @RoyHerrod @danielav7
 /sdk/communication/communication-network-traversal/ @AriZavala2
 /sdk/communication/communication-sms/ @arifibrahim4 @RoyHerrod
 /sdk/communication/communication-short-codes/ @danielav7 @AlonsoMondal @ericasp16
-/sdk/communication/communication-common/ @Azure/acs-identity-sdk
+/sdk/communication/communication-common/ @Azure/acs-identity-sdk @petrsvihlik @AikoBB @maximrytych-ms @martinbarnas-ms
 
 # PRLabel: %Container Registry
 /sdk/containerregistry/ @jeremymeng