Bump mongoid from 8.1.5 to 9.0.1

Bumps [mongoid](https://github.com/mongodb/mongoid) from 8.1.5 to 9.0.1.
- [Release notes](https://github.com/mongodb/mongoid/releases)
- [Changelog](https://github.com/mongodb/mongoid/blob/master/CHANGELOG.md)
- [Commits](mongodb/mongoid@v8.1.5...v9.0.1)

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

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

Gemfile.lock

@@ -86,7 +86,7 @@ GEM
       msgpack (~> 1.2)
     brakeman (6.1.2)
       racc
-    bson (5.0.0)
+    bson (5.0.1)
     builder (3.3.0)
     byebug (11.1.3)
     capybara (3.40.0)
@@ -263,11 +263,10 @@ GEM
     minitest (5.25.0)
     mongo (2.20.1)
       bson (>= 4.14.1, < 6.0.0)
-    mongoid (8.1.5)
+    mongoid (9.0.1)
       activemodel (>= 5.1, < 7.2, != 7.0.0)
       concurrent-ruby (>= 1.0.5, < 2.0)
       mongo (>= 2.18.0, < 3.0.0)
-      ruby2_keywords (~> 0.0.5)
     msgpack (1.7.2)
     multi_xml (0.6.0)
     mutex_m (0.2.0)
@@ -659,7 +658,6 @@ GEM
       rubocop (~> 1.61)
     ruby-progressbar (1.13.0)
     ruby-rc4 (0.1.5)
-    ruby2_keywords (0.0.5)
     rubyzip (2.3.2)
     sanitize (6.1.0)
       crass (~> 1.0.2)