Merge pull request rails#52086 from y-yagi/bring_back_pumarb_to_app_update

Bring back `puma.rb` to target of `app:update`

Author: rafaelfranca

railties/lib/rails/generators/rails/app/app_generator.rb

@@ -128,7 +128,7 @@ def config
         template "application.rb"
         template "environment.rb"
         template "cable.yml" unless options[:update] || options[:skip_action_cable]
-        template "puma.rb"   unless options[:update]
+        template "puma.rb"
         template "storage.yml" unless options[:update] || skip_active_storage?
 
         directory "environments"