Update event_dispatcher.rst

Co-authored-by: Oskar Stark <oskarstark@googlemail.com>

Author: alamirault

event_dispatcher.rst

@@ -131,7 +131,7 @@ listener class:
     Check out the :doc:`Symfony events reference </reference/events>` to see
     what type of object each event provides.
 
-    With this attribute, symfony follows this logic to decide which method to call
+    With this attribute, Symfony follows this logic to decide which method to call
     inside the event listener class:
 
     #. If the ``kernel.event_listener`` tag defines the ``method`` attribute, that's