Bump rubocop from 1.53.1 to 1.56.1

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.53.1 to 1.56.1.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.53.1...v1.56.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -290,7 +290,7 @@ GEM
       railties (>= 5.2)
     rexml (3.2.6)
     rouge (4.1.2)
-    rubocop (1.56.0)
+    rubocop (1.56.1)
       base64 (~> 0.1.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)