Merge pull request #125030 from changeworld/patch-4

Fix typo

Author: ttorble

articles/azure-web-pubsub/tutorial-upstream-auth-mqtt-client.md

@@ -210,7 +210,7 @@ awps-tunnel run --hub {hubName} --upstream http://localhost:{portExposedByYourAu
 
 ## Implement MQTT clients
 
-We will implement the client side in Node.JS.
+We will implement the client side in Node.js.
 
 Initialize a NodeJS project with the following command.
 ```bash