This change fixes three issues:

The link to the API tokens main page from the new entry for

rb-site manage invalidate-api-tokens was using the wrong name.
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).
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.