Symfony 7.1 DI deprecation

[tacman]

The "Symfony\Component\HttpKernel\DependencyInjection\Extension" class is considered internal since Symfony 7.1, to be deprecated in 8.1; use Symfony\Component\DependencyInjection\Extension\Extension instead. It may change without further notice. You should not use it from "Artgris\Bundle\FileManagerBundle\DependencyInjection\ArtgrisFileManagerExtension".

You may want to consider dropping unmaintained versions of Symfony, as I don't know if this class also exists in 6.0 (it does in 6.4 though).

If bumping to 6.4, you can also extend from AbstractBundle, which simplifies the bundle considerably.