chore: fix symfony 6.3 deprecation notices

[Chris53897]

[Application] May 31 14:41:51 |INFO | DEPREC User Deprecated: Method "Symfony\Component\HttpKernel\Bundle\Bundle::build()" might add "void" as a native return type declaration in the future. Do the same in child class "Craue\GeoBundle\CraueGeoBundle" now to avoid errors or add an explicit @return annotation to suppress this message.

Method "Symfony\Component\DependencyInjection\Extension\PrependExtensionInterface::prepend()" might add "void" as a native return type declaration in the future. Do the same in implementation "Craue\GeoBundle\DependencyInjection\CraueGeoExtension" now to avoid errors or add an explicit @return annotation to suppress this message.