Update App Mod .NET containerization tool selection (#48746)

* update tool selection.

Author: jidddddd

docs/azure/media/appmod-dotnet-containerization-tool-selection.png

@@ -30,6 +30,10 @@ The GitHub Copilot app modernization for .NET containerization feature helps you
 
 1. Open your project in Visual Studio.
 
+1. Enable **appModernizationDeploy** in the GitHub Copilot toolbox.
+
+    :::image type="content" source="../../media/appmod-dotnet-containerization-tool-selection.png" alt-text="Screenshot that shows containerization tool selection.":::
+
 1. Start containerization by using one of these approaches:
 
     - **Containerize from Assessment Report**: In the assessment report, select **Run Task** for the Docker Containerization issue.