What does this MR do?
Update doorkeeper for https://github.com/doorkeeper-gem/doorkeeper/issues/1065
Are there points in the code the reviewer needs to double check?
How do we have a test for https://gitlab.com/gitlab-org/gitlab-ce/issues/45647 ?
Does this MR meet the acceptance criteria?
- Changelog entry added, if necessary
- Tests added for this feature/bug
- Has been reviewed by Backend