Reword skip to reflect reality

Author: JonRowe

example_app_generator/spec/verify_mailer_preview_path_spec.rb

@@ -40,7 +40,7 @@ def capture_exec(*ops)
 
   if ENV['RAILS_VERSION'] == 'main' && Rails::VERSION::STRING == "8.0.0.alpha"
     before do
-      skip('This is broken on Rails main but is skipped for green builds of 7.1.x, please fix')
+      skip('This is broken on Rails main but is skipped for green builds, please fix')
     end
   end