Bump league/oauth2-server from 8.5.4 to 8.5.5

Bumps [league/oauth2-server](https://github.com/thephpleague/oauth2-server) from 8.5.4 to 8.5.5.
- [Release notes](https://github.com/thephpleague/oauth2-server/releases)
- [Changelog](https://github.com/thephpleague/oauth2-server/blob/8.5.5/CHANGELOG.md)
- [Commits](thephpleague/oauth2-server@8.5.4...8.5.5)

---
updated-dependencies:
- dependency-name: league/oauth2-server
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>