fix(UserBackend): use OCP GenericEvent instead of Symphony

Signed-off-by: Grigorii K. Shartsev <[email protected]>

lib/UserBackend.php

@@ -33,7 +33,7 @@
 use OCP\IUserManager;
 use OCP\User\Backend\ICountUsersBackend;
 use OCP\UserInterface;
-use Symfony\Component\EventDispatcher\GenericEvent;
+use OCP\EventDispatcher\GenericEvent;
 
 class UserBackend implements IUserBackend, UserInterface, ICountUsersBackend {
 	private string $dbName = 'global_scale_users';