Bump mongoid from 7.5.3 to 7.5.4

Bumps [mongoid](https://github.com/mongodb/mongoid) from 7.5.3 to 7.5.4.
- [Release notes](https://github.com/mongodb/mongoid/releases)
- [Changelog](https://github.com/mongodb/mongoid/blob/master/CHANGELOG.md)
- [Commits](mongodb/mongoid@v7.5.3...v7.5.4)

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

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

Gemfile.lock

@@ -199,7 +199,7 @@ GEM
     minitest (5.19.0)
     mongo (2.15.0)
       bson (>= 4.8.2, < 5.0.0)
-    mongoid (7.5.3)
+    mongoid (7.5.4)
       activemodel (>= 5.1, < 7.1, != 7.0.0)
       mongo (>= 2.10.5, < 3.0.0)
       ruby2_keywords (~> 0.0.5)