Update whats-new.md

Author: alexwolfmsft

articles/intro/whats-new.md

@@ -158,6 +158,16 @@ Updated articles:
 - [Get started: Chat using your own data (Python sample)](../python/get-started-app-chat-template.md) - Use GitHub Actions to deploy a Python web app to Azure App Service on Linux
 - [Overview of the Python web azd templates](../python/overview-azd-templates.md) - Use GitHub Actions to deploy a Python web app to Azure App Service on Linux
 
+### Azure for .NET
+
+New articles:
+
+- [GitHub Copilot app modernization for .NET (Preview) overview](/dotnet/azure/migration/appmod/overview)
+- [Frequently Asked Questions for GitHub Copilot app modernization for .NET (Preview)](/dotnet/azure/migration/appmod/faq)
+- [Predefined tasks for GitHub Copilot app modernization for .NET (Preview)](/dotnet/azure/migration/appmod/predefined-tasks)
+- [Quickstart: Assess and migrate a .NET Project with GitHub Copilot app modernization for .NET (Preview)](/dotnet/azure/migration/appmod/quickstart)
+- [Contoso University migration sample](/dotnet/azure/migration/appmod/sample)
+
 ## What's new for May 2025
 
 ### AI apps using Azure services