Build(deps-dev): bump rubocop from 1.55.1 to 1.56.0

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.55.1 to 1.56.0.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.55.1...v1.56.0)

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

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

Gemfile.lock

@@ -88,6 +88,7 @@ GEM
       aws-sigv4 (~> 1.6)
     aws-sigv4 (1.6.0)
       aws-eventstream (~> 1, >= 1.0.2)
+    base64 (0.1.1)
     bcrypt (3.1.19)
     better_html (2.0.2)
       actionview (>= 6.0)
@@ -368,7 +369,8 @@ GEM
       rspec-mocks (~> 3.12)
       rspec-support (~> 3.12)
     rspec-support (3.12.1)
-    rubocop (1.55.1)
+    rubocop (1.56.0)
+      base64 (~> 0.1.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)