Update meeting-interop.md

Author: tomaschladek

articles/communication-services/quickstarts/chat/meeting-interop.md

@@ -7,6 +7,7 @@ ms.author: askaur
 ms.date: 06/30/2021
 ms.topic: quickstart
 ms.service: azure-communication-services
+ms.subservice: teams-interop
 zone_pivot_groups: acs-plat-web-ios-android-windows
 ms.custom: mode-other
 ---