Restore useful comment

Author: koic

.github/workflows/test.yml

@@ -83,7 +83,7 @@ jobs:
               -e "/gem 'rubocop-performance',/d" \
               -e "/gem 'rubocop-rspec',/d" -i Gemfile
           cat << EOF > Gemfile.local
-            gem 'rubocop', '1.72.1'
+            gem 'rubocop', '1.72.1' # Specify the oldest supported RuboCop version
           EOF
       - uses: ruby/setup-ruby@v1
         with: