Broken FOSS `master` due to `docs lint`

Job #317470489 failed for gitlab-foss@69849c28:

$ bundle exec nanoc check internal_links
Loading site… done

Error: One or more checks failed
  Running check internal_links…   error
Issues found!
  public/ce/ci/yaml/README.html:
    [ ERROR ] internal_links - broken reference to file:///tmp/gitlab-docs/public/ce/ci/yaml/using-onlychanges-without-pipelines-for-merge-requests