With the latest winget-create release, the preferred method for
providing the GitHub token in CI/CD environment is via the environment
variable `WINGET_CREATE_GITHUB_TOKEN`. Removed use of `--token` and
switched to environment variable. See https://aka.ms/winget-create-token
for details.
I think this workflow needs to run on push to `main` _as well as_ pull
request to main so that it shows up as an available branch protection
status check.
Given that it's not just PRs any longer, I renamed it too.
