Update doorkeeper

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
• Review
  • Has been reviewed by Backend

What are the relevant issue numbers?

Closes #45433 (closed), #45647 (closed)