ImageStyleDownloadController::deliver() signature error

Problem/Motivation

PHP Fatal error: Declaration of Drupal\image_derivative_token\Controller\ImageStyleDownloadController::deliver(Symfony\Component\HttpFoundation\Request $request, $scheme, Drupal\image\ImageStyleInterface $image_style) must be compatible with Drupal\image\Controller\ImageStyleDownloadController::deliver(Symfony\Component\HttpFoundation\Request $request, $scheme, Drupal\image\ImageStyleInterface $image_style, string $required_derivative_scheme)

Apparently this method's signature changed back in January.
https://git.drupalcode.org/project/drupal/-/blob/fd36154396396b44c5c5f48...

Steps to reproduce

I got the error by running drush cr

Proposed resolution

Fix the method signature.

Remaining tasks

Review patch (the introduced variable might be important, the attached patch just forwards it), MR, merge

User interface changes

API changes

Data model changes