Bump doorkeeper from 5.3.3 to 5.4.0 (#13733)

Bump doorkeeper from 5.3.3 to 5.4.0 (#13733)

* Bump doorkeeper from 5.3.3 to 5.4.0

Bumps [doorkeeper](https://github.com/doorkeeper-gem/doorkeeper) from 5.3.3 to 5.4.0.
- [Release notes](https://github.com/doorkeeper-gem/doorkeeper/releases)
- [Changelog](https://github.com/doorkeeper-gem/doorkeeper/blob/master/CHANGELOG.md)
- [Commits](https://github.com/doorkeeper-gem/doorkeeper/compare/v5.3.3...v5.4.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
* Fix tests

* Fix use of Doorkeeper::AccessToken.find_or_create_for

* Fix tests?

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Thibaut Girka <thib@sitedethib.com>