Update uninstall documentation for Win

[bartizan]

An improvement of documentation
According to changes of issue #847, the uninstall documentation for Windows in HowTo section needs to be updated
https://learn.microsoft.com/en-us/microsoft-cloud/dev/dev-proxy/how-to/uninstall?pivots=client-operating-system-windows

The instruction could be left as some manual directions to uninstall the DevProxy CA certificate.

Important

Take into account that there are two folders (not only /Personal/Certificates) that have the Dev Proxy CA certificate:
Personal and Trusted Root Certification Authorities

[waldekmastykarz]

Good point. Let's wait until we merge #1208

[waldekmastykarz]

Opening this up as we've merged #1208