Bump @ckeditor/ckeditor5-dev-utils from 23.5.1 to 23.6.0

Bumps [@ckeditor/ckeditor5-dev-utils](https://github.com/ckeditor/ckeditor5-dev/tree/HEAD/packages/ckeditor5-dev-utils) from 23.5.1 to 23.6.0.
- [Release notes](https://github.com/ckeditor/ckeditor5-dev/releases)
- [Changelog](https://github.com/ckeditor/ckeditor5-dev/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ckeditor/ckeditor5-dev/commits/v23.6.0/packages/ckeditor5-dev-utils

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>