This removes sensitivity to the BROWSER environment variable in tests
and makes it easier to verify the URL that the browser was invoked with
without having to stub sub-processes.
Since GitHub CLI now offers to authenticate your Git as well, the token
we request here will be used for git pushes. Since we do anticipate our
users making edits to their GitHub Actions workflow files, we want them
to be able to push their changes, and this scope allows that.
