Fix test class name

Author: convenient

dev/tests/integration/testsuite/Magento/Framework/GraphQl/GraphQlSchemaStitching/GraphQlReaderTest.php

@@ -6,7 +6,7 @@
 
 declare(strict_types=1);
 
-namespace Magento\Framework\GraphQlSchemaStitching\Test\Unit;
+namespace Magento\Framework\GraphQl\GraphQlSchemaStitching;
 
 use Magento\Framework\GraphQlSchemaStitching\GraphQlReader;
 use Magento\Framework\ObjectManagerInterface;