Update howto-awps-tunnel.md

Author: vicancy

articles/azure-web-pubsub/howto-awps-tunnel.md

@@ -74,6 +74,8 @@ export WebPubSubConnectionString="<your connection string>"
 SET WebPubSubConnectionString=<your connection string>
 ```
 
+---
+
 ### Using Azure Identity
 
 1. In your Web PubSub service portal, go to Access control tab, and add role `Web PubSub Service Owner` to your identity.
@@ -113,4 +115,4 @@ SET WebPubSubConnectionString=<your connection string>
 
    :::image type="content" alt-text="Screenshot of starting the test WebSocket connection and send message." source="media\howto-awps-tunnel\overview-client.png" :::
 
-   :::image type="content" alt-text="Screenshot of showing the traffic inspection." source="media\howto-awps-tunnel\overview-tunnel.png" :::
+   :::image type="content" alt-text="Screenshot of showing the traffic inspection." source="media\howto-awps-tunnel\overview-tunnel.png" :::