[S360] Revert "[CmdPal][AOT] Replace CommunityToolkit.MarkdownTextBlock with CommunityToolkit.Lab.MarkdownTextBlock (#39974)" (#40055)

This reverts commit 7d257cf00c due to a
security concern involving multiple feeds

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src/modules/cmdpal/Microsoft.CmdPal.UI/Microsoft.CmdPal.UI.csproj

@@ -71,8 +71,7 @@
     <PackageReference Include="CommunityToolkit.WinUI.Converters" />
     <PackageReference Include="CommunityToolkit.WinUI.Animations" />
     <PackageReference Include="CommunityToolkit.WinUI.Extensions" />
-    <!--<PackageReference Include="CommunityToolkit.WinUI.UI.Controls.Markdown" />-->
-	<PackageReference Include="CommunityToolkit.Labs.WinUI.Controls.MarkdownTextBlock" />
+    <PackageReference Include="CommunityToolkit.WinUI.UI.Controls.Markdown" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" />
     <PackageReference Include="Microsoft.Windows.SDK.BuildTools" />
     <PackageReference Include="Microsoft.WindowsAppSDK" />