Fix namespace

Author: tvdijen

tests/Addressing/ElementRegistryTest.php

@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace SimpleSAML\Test\WebServices\Security;
+namespace SimpleSAML\Test\WebServices\Addressing;
 
 use PHPUnit\Framework\Attributes\Group;
 use PHPUnit\Framework\TestCase;