DEV: Upgrade Rails to version 7.1

---------

Co-authored-by: Jarek Radosz <jradosz@gmail.com>

spec/lib/site_setting_extension_spec.rb

@@ -422,9 +422,7 @@ RSpec.describe SiteSettingExtension do
       end
     end
 
-    let :test_enum_class do
-      TestEnumClass
-    end
+    let(:test_enum_class) { TestEnumClass }
 
     before do
       settings.setting(:test_enum, "en", enum: test_enum_class)