Bump rubocop-rails from 2.21.2 to 2.22.1 (#722)

Bumps [rubocop-rails](https://github.com/rubocop/rubocop-rails) from 2.21.2 to 2.22.1.
- [Release notes](https://github.com/rubocop/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rails@v2.21.2...v2.22.1)

---
updated-dependencies:
- dependency-name: rubocop-rails
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -324,7 +324,7 @@ GEM
     rainbow (3.1.1)
     rake (13.0.6)
     rbtree3 (0.7.1)
-    regexp_parser (2.8.1)
+    regexp_parser (2.8.2)
     rexml (3.2.6)
     roo (2.10.0)
       nokogiri (~> 1)
@@ -358,13 +358,13 @@ GEM
       rubocop-ast (>= 1.28.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.29.0)
+    rubocop-ast (1.30.0)
       parser (>= 3.2.1.0)
     rubocop-capybara (2.19.0)
       rubocop (~> 1.41)
     rubocop-factory_bot (2.24.0)
       rubocop (~> 1.33)
-    rubocop-rails (2.21.2)
+    rubocop-rails (2.22.1)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)