pr-comments-with-links does not list renamed files in the "Check redirects"

[tbouffard]

Thanks to #140, renamed files are not retrieved from the list of files touched by the PR.
Such files require that a redirect is configured (the file has moved, so the previous location is no longer available), so IMHO, it should be listed in the "Check redirects" paragraph.

I have detected the issue in the cloud documentation content repository.

PR 62	PR 64

In PR 62 and 64, it should list:

• FAQ
• Getting_started_with_Bonita_Cloud
• Overview
  In PR 62, it should also list the pages related to "access" and "ldap-configuration"

Notice that in PR 62, the former access page is listed in "Check redirects" because GitHub see a deleted of the former page, and the add of the new page, not a rename.

Possible solution

In the response of the REST API listing the files touched by a PR (https://docs.github.com/en/rest/pulls/pulls?apiVersion=2022-11-28#list-pull-requests-files), the response schema mention that an previous_filename attribute exists. It could be used to get the former name of a page and list it in the "Check redirects" paragraph