Extend AbstractBundle

This is required when the bundle class is not at the root path of the
bundle, which is the case since doctrine#1767

src/DoctrineBundle.php

@@ -25,15 +25,15 @@
 use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
 use Symfony\Component\DependencyInjection\Compiler\PassConfig;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\HttpKernel\Bundle\Bundle;
+use Symfony\Component\HttpKernel\Bundle\AbstractBundle;
 
 use function assert;
 use function class_exists;
 use function clearstatcache;
 use function spl_autoload_unregister;
 
 /** @final since 2.9 */
-class DoctrineBundle extends Bundle
+class DoctrineBundle extends AbstractBundle
 {
     private ?Closure $autoloader = null;