minor #16150 [Notifier] Corrected typo in notifier.rst (askeita)

This PR was merged into the 5.3 branch.

Discussion
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[Notifier] Corrected typo in notifier.rst

Replaced "send" by "sent".

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Commits
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66a248a Corrected typo in notifier.rst

Author: javiereguiluz

notifier.rst

@@ -615,7 +615,7 @@ The
 :class:`Symfony\\Component\\Notifier\\Notification\\SmsNotificationInterface`
 and
 :class:`Symfony\\Component\\Notifier\\Notification\\EmailNotificationInterface`
-also exists to modify messages send to those channels.
+also exists to modify messages sent to those channels.
 
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