message: docs: updating the docs saying that it is now possible to provide your own Field Extensions
diff: @@ -284,8 +284,8 @@ to publish to. And it can be any host that is listed in your `integrations`
  config in `app-config.yaml`.
  The `RepoUrlPicker` is a custom field that we provide part of the
  -`plugin-scaffolder`. It's currently not possible to create your own fields yet,
  -but contributions are welcome! :)
  +`plugin-scaffolder`. You can provide your own custom fields by
  +[writing your own Custom Field Extensions](./writing-custom-field-extensions.md)
  #### The Owner Picker
  