add raise hand state to how-to

Author: rzdor

articles/communication-services/toc.yml

@@ -411,6 +411,8 @@ items:
         href: how-tos/cte-calling-sdk/manage-calls.md
       - name: Record calls
         href: how-tos/calling-sdk/record-calls.md
+      - name: Raise Hand State
+        href: how-tos/calling-sdk/raise-hand.md
       - name: Enable push notifications
         href: how-tos/calling-sdk/push-notifications.md
       - name: Show transcription state