Make docs-only PRs skip CI.yml test suite (15 secs instead of 15 minutes) (#23246)

These were previously in place, but removed while we evaluated Merge Queues (since reverted).
ffc6b7b102Peter Tripp committed on 1/16/2025, 5:09:54 PM· committed by GitHubparent70547ea
1 file changedLine totals unavailable