Update command for dotnet new --install

`dotnet new --install' is deprecated. Use 'dotnet new install' instead.

Author: jaliyaudagedara

support/developer/visualstudio/installation/maui-template-missing-vs-2022-professional.md

@@ -22,7 +22,7 @@ To install the MAUI template, follow these steps:
 
 1. Open the Command Prompt.
 1. Run the command `dotnet workload install maui` to install the MAUI workload if it's not installed. This command installs the necessary components and dependencies for MAUI development.
-1. After the MAUI workload is installed, run the command `dotnet new --install Microsoft.Maui.Templates` to install the MAUI templates. This command fetches and installs the latest templates for creating MAUI projects.
+1. After the MAUI workload is installed, run the command `dotnet new install Microsoft.Maui.Templates` to install the MAUI templates. This command fetches and installs the latest templates for creating MAUI projects.
 
 Once the templates are installed, you can see the .NET MAUI template available in Visual Studio when creating a new project.