[Feat]: Update readme for windows docs

[benjivesterby]

Pull docs update from PR for the windows changes. Be sure to include the must install gitbash with symlinks and source ~/.bashrc and how to create the ~/.bashrc file for path

vi ~/.bashrc
export PATH=$PATH:"/c/Users/<username>/bin"
exit gitbash and reopen
error at top may say a `.bash_profile` was created for you
curl command from docs
source ~/.bashrc
gvm <version>
``