`--url` is GitLab instance URL, and not the address of the runner
What does this MR do?
Fixes option description.
Why was this MR needed?
To clarify which option corresponds to this interactive prompt.
$ gitlab-runner register
...
Enter the GitLab instance URL (for example, https://gitlab.com/):
What's the best way to test this MR?
CI/CD and running this manually.
$ gitlab-runner register -h | grep instance
What are the relevant issue numbers?
Edited by Anatoli Babenia