More clearly state SimulinkConnector only works on Windows

link : https://doc.qt.io/qtdesignstudio/studio-simulink.html

This documentation has 

On Windows, Qt Design Studio provides built-in support for connectivity to Simulink models, 

But it'd say it's better for it to have "Note:" section which says something like "SimulinkConnector only supports Windows. Both Qt Design Studio and Simulink must run on the same machine."

Keep in mind that the part "Both Qt Design Studio and Simulink must run on the same machine" hasn't been verified by me. Please write appropriately based on its actual technical limitation.