minor #10116 Update http_kernel_httpkernel_class.rst (mkurc1)

This PR was submitted for the 4.1 branch but it was merged into the 4.0 branch instead (closes #10116).

Discussion
----------

Update http_kernel_httpkernel_class.rst

Remove suffix Action from path to ErrorController. Otherwise it doesn't work.

<!--

If your pull request fixes a BUG, use the oldest maintained branch that contains
the bug (see https://symfony.com/roadmap for the list of maintained branches).

If your pull request documents a NEW FEATURE, use the same Symfony branch where
the feature was introduced (and `master` for features of unreleased versions).

-->

Commits
-------

a6e0890 Update http_kernel_httpkernel_class.rst

Author: javiereguiluz

create_framework/http_kernel_httpkernel_class.rst

@@ -82,7 +82,7 @@ can take any valid controller as an exception handler, so you can create an
 ErrorController class instead of using a Closure::
 
     $listener = new HttpKernel\EventListener\ExceptionListener(
-        'Calendar\Controller\ErrorController::exceptionAction'
+        'Calendar\Controller\ErrorController::exception'
     );
     $dispatcher->addSubscriber($listener);