Merge pull request rails#53691 from sato11/format-new-framework-defaults-x-y

Correct misformatted reference to `config/initializers/new_framework_defaults_*.rb` [ci skip]

Author: kamipo

guides/source/upgrading_ruby_on_rails.md

@@ -75,7 +75,7 @@ Don't forget to review the difference, to see if there were any unexpected chang
 
 The new Rails version might have different configuration defaults than the previous version. However, after following the steps described above, your application would still run with configuration defaults from the *previous* Rails version. That's because the value for `config.load_defaults` in `config/application.rb` has not been changed yet.
 
-To allow you to upgrade to new defaults one by one, the update task has created a file `config/initializers/new_framework_defaults_X.Y.rb` (with the desired Rails version in the filename). You should enable the new configuration defaults by uncommenting them in the file; this can be done gradually over several deployments. Once your application is ready to run with new defaults, you can remove this file and flip the `config.load_defaults` value.
+To allow you to upgrade to new defaults one by one, the update task has created a file `config/initializers/new_framework_defaults_X_Y.rb` (with the desired Rails version in the filename). You should enable the new configuration defaults by uncommenting them in the file; this can be done gradually over several deployments. Once your application is ready to run with new defaults, you can remove this file and flip the `config.load_defaults` value.
 
 Upgrading from Rails 8.0 to Rails 8.1
 -------------------------------------