Add direct link to templates directory within the GitHub project

Author: citelao

hub/apps/winui/winui3/winui-project-templates-in-visual-studio.md

@@ -75,4 +75,5 @@ The following item templates are available for use in a WinUI 3 project. To acce
 * [Windows App SDK](../../windows-app-sdk/index.md)
 * [Create your first WinUI 3 project](./create-your-first-winui3-app.md)
 * [Stable release channel for the Windows App SDK](../../windows-app-sdk/stable-channel.md)
-* [Windows App SDK Samples](https://github.com/microsoft/WindowsAppSDK-Samples)
+* [Windows App SDK Samples](https://github.com/microsoft/WindowsAppSDK-Samples)
+* [Templates source in Windows App SDK Samples](https://github.com/microsoft/WindowsAppSDK-Samples/tree/main/Templates)