Govern: Authorization Group documentation updates

Please be sure to double-check the file for any other version mentions as vale can miss.

Once a merge request is created link it to this issue. Note - only 1 merge request per issue to reduce the overhead as the technical writing team needs to review all changes.

Affected files:

 gitlab/doc/user/permissions.md
 43:75   suggestion  If possible, remove the reference to 'GitLab 14.'.  gitlab.OutdatedVersions 
 44:84   suggestion  If possible, remove the reference to 'GitLab 14.'.  gitlab.OutdatedVersions 
 49:36   suggestion  If possible, remove the reference to 'GitLab 14.'.  gitlab.OutdatedVersions 
 55:6    suggestion  If possible, remove the reference to 'GitLab 14.'.  gitlab.OutdatedVersions 
 385:82  suggestion  If possible, remove the reference to 'GitLab 13.'.  gitlab.OutdatedVersions 

✔ 0 errors, 0 warnings and 5 suggestions in 4 files.