Update toc.yml

Author: bashan-git

articles/communication-services/toc.yml

@@ -388,7 +388,7 @@ items:
       href: https://azure.github.io/azure-sdk-for-java/communication.html#azure-communication-sms
     - name: SMS (Python)
       href: https://azure.github.io/azure-sdk-for-python/communication.html#azure-communication-sms
-   - name: Email libraries
+  - name: Email libraries
     items:
     - name: Email (JavaScript)
       href: https://azure.github.io/azure-sdk-for-js/communication.html#azure-communication-email