Add ms.custom value to identify copilot highlight

Author: anandmeg

learn-pr/windows/get-started-with-web-development/index.yml

@@ -9,7 +9,7 @@ metadata:
   manager: mijacobs
   ms.topic: module
   ms.service: vs-code
-  ms.custom: engagement-fy23
+  ms.custom: engagement-fy23, copilot-scenario-highlight
 title: Get started with web development using Visual Studio Code
 summary: Practice the beginning steps of web development by creating a simple web project in Visual Studio Code that contains a web page, a CSS file, and a JavaScript file. Learn how to use developer tools in your browser to check your work.