Upgrade message for gitlab-shell should be more actionable

When I am using an outdated version of gitlab-shell in my local dev environment, I see the following message in my Terminal:

This version of GitLab depends on gitlab-shell 14.21.0, but you're running 14.13.0. Please update gitlab-shell

This error message does not tell me how to upgrade gitlab-shell, only that I should.

Question: Can we update this message with a link to documentation that tells me how to upgrade?

I believe that this error message is found in the code here.

A search for "Update gitlab-shell" in the GitLab docs yields nothing. I figured out how to upgrade via reading this old issue: gitlab#17468 (closed)