Update create_framework/event_dispatcher.rst

Co-authored-by: Christian Flothmann <[email protected]>

Author: alamirault

create_framework/event_dispatcher.rst

@@ -121,7 +121,7 @@ the registration of a listener for the ``response`` event::
         $response = $event->getResponse();
 
         if ($response->isRedirection()
-            || ($response->headers->has('Content-Type') && false === str_contains($response->headers->get('Content-Type'), 'html'))
+            || ($response->headers->has('Content-Type') && !str_contains($response->headers->get('Content-Type'), 'html'))
             || 'html' !== $event->getRequest()->getRequestFormat()
         ) {
             return;