Document how to skip CI for a specific commit or push

Consider that I'm in a team maintaining 2000 packages and I want to update the "Maintainer" field on all packages. I'm going to do this with "mr" to automate the operation.

I know that this will trigger 2000 pipelines and that I will annoy Salsa admins because it's clearly wasted resources... so I would like to have a way to mark the commit in some way so that the CI doesn't trigger on it. Maybe it could be a "GitLab-CI: skip" field in the commit message...