Move a couple things around in the docs.

Review Request #12594 — Created Sept. 12, 2022 and submitted — Latest diff uploaded

Review Board

This change fixes three issues:

  1. The link to the API tokens main page from the new entry for
    rb-site manage invalidate-api-tokens was using the wrong name.
  2. The scmtool hook doc used an underscore in the filename rather than a
    hyphen, which didn't match anything else (including the toctree
    entry, causing an error).
  3. The new root comment endpoints were listed in their own section in
    the table of contents for resources, right at the beginning--this
    made them appear to be a lot more important than they actually are.
    I've moved them to be with all of the other review/comment resources.

Built docs and looked for errors. Checked the resources TOC.