Run Rubocop on Ruby 3.4 on CI

Author: andrykonchin

.github/workflows/style.yml

@@ -23,7 +23,7 @@ jobs:
         bundler:
           - latest
         ruby:
-          - "3.3"
+          - "3.4"
     runs-on: ubuntu-latest
     env: # $BUNDLE_GEMFILE must be set at the job level, so it is set for all steps
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/style.gemfile

.rubocop_thread_safety.yml

@@ -1,6 +1,6 @@
 # It would be good to make the gem more thread safe, but at the moment it is not entirely.
 # TODO: Comment out the following to see code needing to be refactored for thread safety!
-ThreadSafety/ClassAndModuleAttributes:
-  Enabled: false
 ThreadSafety/ClassInstanceVariable:
   Enabled: false
+ThreadSafety/ClassAndModuleAttributes:
+  Enabled: false