If the `GITHUB_TOKEN` is defined in the Ansible controller's
environment it is used to set the GitHub REST API authentication header.
This is they passed to all `uri` modules tasks which interact with the
GitHub REST API. If the `GITHUB_TOKEN` is not set, the authentication
header is not used.
Fixes#19
Git for Windows v2.37.3 (and probably all version in the v2.37 series)
cause the unofficial win_git module to hang. Downgrading the v2.36.1
works around this issue for the time being. The Chocolatey package for
Git also does not respect the version flag, so installation is now
performed manually by grabbing the v2.36.1 installer from the GitHub
release asset and running it manually when installation is required.
