mention the removal of `--builder` in 4.0 release notes.
|@@ -89,6 +89,10 @@ Please refer to the [Changelog](https://github.com/rails/rails/blob/master/railt|
|* Threadsafe on by default|
|+* Ability to use a custom builder by passing `--builder` (or `-b`) to|
|+ `rails new` has been removed. Consider using application templates|
|+ instead. ([Pull Request](https://github.com/rails/rails/pull/9401))|
|* `config.threadsafe!` is deprecated in favor of `config.eager_load` which provides a more fine grained control on what is eager loaded.|