Update maui.md

docs/en/get-started/maui.md

@@ -13,9 +13,11 @@ dotnet tool install -g Volo.Abp.Studio.Cli
 Then use the `abp new` command in an empty folder to create a new solution:
 
 ````bash
-abp new Acme.MyMauiApp -t maui
+abp new Acme.MyMauiApp -t maui --old
 ````
 
+> **Note**: Since this startup template is not provided by the new ABP Studio Templates yet, you need to pass the `--old` parameter at the end of the command to use the old CLI & templating system for this startup template.
+
 `Acme.MyMauiApp` is the solution name, like *YourCompany.YourProduct*. You can use single level, two-levels or three-levels naming.
 
 ## Solution Structure