In Overlay repository PRs, PR actions can be started by adding comments like:

/publish

/update-versions

/update-commit

Currently if there is any text in the comment  in addition to the above text, even if it is only a a new line, the action will be silently ignored.

 
We should make the PR actions triggering more robust, by having a first step in the workflow that more robustly extracts the comment from a trimmed line inside the comments.