Mentioning the keyboard layout in the Dasharo Tools Suite docs

[wessel-novacustom]

Many of our customers don't use the US keyboard layout. I think the docs overview documentation page should have a warning that only the US keyboard layout is supported in the EDK II environment.

[miczyg1]

@macpijan @mkopec cc

[macpijan]

I assume you mean this page: https://docs.dasharo.com/dasharo-menu-docs/overview/
Somewhere at the top of this document