In https://gitlab.com/gitlab-org/gitlab/-/merge_requests/77301 we renamed
documentation metadata from `group: Access`
to `group: Authentication & Authorization`.

As per
https://gitlab.com/gitlab-com/www-gitlab-com/-/merge_requests/94650#note_791749918,
https://gitlab.com/gitlab-com/www-gitlab-com/-/merge_requests/96097
we changed `Authentication & Authorization`
to `Authentication and Authorization`.

This MR fixes the group name in `gitlab` repo.