Follow-up from "Update docs review apps to use project token"

The following discussion from !53336 (merged) should be addressed:

• @marcel.amirault started a discussion: (+4 comments)

  @axil Seems to work fine. From this review app job: https://gitlab.com/gitlab-org/gitlab/-/jobs/1006836403

  

  I had to add a minor docs change to be able to trigger the review app. Now that I've verified it works, I'll go ahead and pull the commit. If it looks good, can you forward it to whoever roulette picks?