Update notifier.rst

Author: jschaedl

notifier.rst

@@ -375,7 +375,7 @@ both an email and sms notification to the user.
 The default notification also has a ``content()`` and ``emoji()`` method to
 set the notification content and icon.
 
-Symfony provides two types of recipients:
+Symfony provides the following recipients:
 
 :class:`Symfony\\Component\\Notifier\\Recipient\\NoRecipient`
     This is the default and is useful when there is no need to have