Revise tooling documentation for ASP.NET migration

Updated the tooling documentation to emphasize the use of the GitHub Copilot app modernization for migrating ASP.NET Framework applications to ASP.NET Core, replacing mentions of the deprecated .NET Upgrade Assistant.

Author: wadepickett

aspnetcore/migration/fx-to-core/tooling.md

@@ -9,15 +9,16 @@ uid: migration/fx-to-core/tooling
 ---
 # Use tooling to help migrate ASP.NET Framework to ASP.NET Core
 
-> [!IMPORTANT]
-> .NET Upgrade Assistant is officially deprecated. Use the [GitHub Copilot app modernization chat agent](/dotnet/core/porting/github-copilot-app-modernization/overview) instead, which is included with Visual Studio 2026 and Visual Studio 2022 17.14.16 or later. This agent analyzes your projects and dependencies, produces a step-by-step migration plan with targeted recommendations and automated code fixes, and commits each change so you can validate or roll back. It automates common porting tasks—updating project files, replacing deprecated APIs, and resolving build issues—so you can modernize faster with less manual effort.
-
-This article provides guidance on how to upgrade ASP.NET Framework applications (MVC, Web API, and Web Forms) to ASP.NET Core.
+## The GitHub Copilot app modernization
+To upgrade ASP.NET Framework applications (MVC, Web API, and Web Forms) to ASP.NET Core use the [GitHub Copilot app modernization Visual Studio extension](/dotnet/core/porting/github-copilot-app-modernization/overview
 
-To learn how to upgrade your ASP.NET apps using the recommended tooling, see [How to upgrade a .NET app with GitHub Copilot app modernization](/dotnet/core/porting/github-copilot-app-modernization/how-to-upgrade-with-github-copilot).
+The GitHub Copilot app modernization is a Visual Studio extension that leverages AI to simplify the process of upgrading legacy .NET applications. By integrating with GitHub Copilot Chat, this tool analyzes your solution to generate upgrade plans and assists in rewriting code to support ASP.NET Core. It streamlines the migration workflow by reducing manual effort, identifying dependencies, and providing interactive, automated guidance for modernizing your codebase. To learn how to upgrade your ASP.NET apps using the recommended tooling, see [How to upgrade a .NET app with GitHub Copilot app modernization](/dotnet/core/porting/github-copilot-app-modernization/how-to-upgrade-with-github-copilot).
 
 If your .NET Framework project has supporting libraries in the solution that are required, they should be upgraded to .NET Standard 2.0, if possible. For more information, see [Upgrade supporting libraries](xref:migration/fx-to-core/start#upgrade-supporting-libraries).
 
+> [!IMPORTANT]
+> .NET Upgrade Assistant is officially deprecated. Use the [GitHub Copilot app modernization chat agent](/dotnet/core/porting/github-copilot-app-modernization/overview) instead, which is included with Visual Studio 2026 and Visual Studio 2022 17.14.16 or later. This agent analyzes your projects and dependencies, produces a step-by-step migration plan with targeted recommendations and automated code fixes, and commits each change so you can validate or roll back. It automates common porting tasks—updating project files, replacing deprecated APIs, and resolving build issues—so you can modernize faster with less manual effort.
+
 ## See also
 
-* [GitHub Copilot app modernization overview](/dotnet/core/porting/github-copilot-app-modernization/overview)
+* [Quickstart: Assess and migrate a .NET project with GitHub Copilot app modernization for .NET](/dotnet/azure/migration/appmod/quickstart)