bug symfony#20404 Fix error_pages.rst setResponse() (Florian-Merle)

This PR was merged into the 5.4 branch.

Discussion
----------

Fix error_pages.rst setResponse()

I believe symfony#13877 should not have been merged because `setException` has been replaced by `setThrowable`, not `setResponse`.

Commits
-------

8905736 Fix error_pages.rst setResponse()

Author: OskarStark

controller/error_pages.rst

@@ -319,7 +319,7 @@ error pages.
 
 .. note::
 
-    If your listener calls ``setThrowable()`` on the
+    If your listener calls ``setResponse()`` on the
     :class:`Symfony\\Component\\HttpKernel\\Event\\ExceptionEvent`
     event, propagation will be stopped and the response will be sent to
     the client.