[docs] Installation for Windows docs improved

[jjfumero]

Description

Improve the documentation for the installation of TornadoVM on Windows 10/11

Problem description

n/ a.

Backend/s tested

Mark the backends affected by this PR.

• [X] OpenCL
• [X] PTX
• [X] SPIRV

OS tested

Mark the OS where this PR is tested.

• [ ] Linux
• [ ] OSx
• [X] Windows

Did you check on FPGAs?

If it is applicable, check your changes on FPGAs.

• [ ] Yes
• [X] No

How to test the new patch?

Link to the documentation.

[jjfumero]

All comments resolved.