Update toc.yml

adding Messaging Connect

Author: dbasantes

articles/communication-services/toc.yml

@@ -304,6 +304,8 @@ items:
     href: concepts/sms/concepts.md
   - name: Pricing
     href: concepts/sms-pricing.md
+  - name: Messaging Connect
+    href: concepts/sms/messaging-connect.md
   - name: SMS SDK overview
     href: concepts/sms/sdk-features.md
   - name: SMS FAQ