Maintenance: Update dependency rubocop to v1.56.3

Gemfile.lock

@@ -490,7 +490,7 @@ GEM
       rspec-core (> 3.3)
     rspec-support (3.12.1)
     rszr (1.3.0)
-    rubocop (1.56.2)
+    rubocop (1.56.3)
       base64 (~> 0.1.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)