Add Troubleshooting to the left menu

Author: pavelprystinka

articles/communication-services/toc.yml

@@ -402,6 +402,8 @@ items:
       href: how-tos/ui-library-sdk/theming.md
     - name: Participant View Data Injection
       href: how-tos/ui-library-sdk/data-model.md
+    - name: Troubleshooting
+      href: how-tos/ui-library-sdk/troubleshooting.md
   - name: Using the Call Automation library
     items: 
     - name: Control and steer calls