ci: skip ci-fairy checks on main branch
We merged a commit by mistake which doesn't have S-o-b. ci-fairy is unhappy about it and will fail the check. Skip it if we aren't running in a merge request context.
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We merged a commit by mistake which doesn't have S-o-b. ci-fairy is unhappy about it and will fail the check. Skip it if we aren't running in a merge request context.