Add tip for reviewing config file README

Added a tip about reviewing the config file and its README on GitHub.

Author: jwmsft

hub/apps/get-started/start-here.md

@@ -26,6 +26,10 @@ Open [Windows Terminal](/windows/terminal/) and run the following command in Pow
 
 ```powershell
 winget configure -f https://aka.ms/winui-config
+```
+
+> [!TIP]
+> To review the config file and learn more, see its [README](https://github.com/microsoft/winget-dsc/blob/main/samples/Configuration%20files/Learn%20tutorials/WinUI/README.md] on GitHub.
 
 #### [Manual installation](#tab/manual)