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](https://github.com/rubocop/rubocop/compare/v1.55.1...v1.56.0)

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

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

Gemfile.lock

@@ -36,6 +36,7 @@ GEM
       fiber-annotation
       io-event (~> 1.1)
       timers (~> 4.1)
+    base64 (0.1.1)
     builder (3.2.4)
     coffee-script (2.4.1)
       coffee-script-source
@@ -217,7 +218,8 @@ GEM
     regexp_parser (2.8.1)
     rexml (3.2.6)
     rouge (4.1.3)
-    rubocop (1.55.1)
+    rubocop (1.56.0)
+      base64 (~> 0.1.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)