fix: wrong definition content type

src/BeSimple/SoapBundle/Controller/SoapWebServiceController.php

@@ -105,7 +105,7 @@ class SoapWebServiceController implements ContainerAwareInterface
                 ['webservice' => $webservice],
                 UrlGeneratorInterface::ABSOLUTE_URL
             )
-        ));
+        ), 200, ['Content-Type' => 'application/xml']);
 
         /** @var Request $request */
         $request = $this->container->get('request_stack')->getCurrentRequest();