Bump doorkeeper from 5.6.6 to 5.6.7

Bumps [doorkeeper](https://github.com/doorkeeper-gem/doorkeeper) from 5.6.6 to 5.6.7.
- [Release notes](https://github.com/doorkeeper-gem/doorkeeper/releases)
- [Changelog](https://github.com/doorkeeper-gem/doorkeeper/blob/main/CHANGELOG.md)
- [Commits](doorkeeper-gem/doorkeeper@v5.6.6...v5.6.7)

---
updated-dependencies:
- dependency-name: doorkeeper
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -135,7 +135,7 @@ GEM
       zxcvbn-ruby (>= 0.0.2)
     docile (1.4.0)
     domain_name (0.6.20231109)
-    doorkeeper (5.6.6)
+    doorkeeper (5.6.7)
       railties (>= 5)
     erubi (1.12.0)
     execjs (2.9.1)