feature symfony#15366 [Notifier] [MessageMedia] add docs (vuphuong87)

This PR was squashed before being merged into the 5.4 branch.

Discussion
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[Notifier] [MessageMedia] add docs

MessageMedia Bridge: symfony/symfony#41375

Commits
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1b5fd8c [Notifier] [MessageMedia] add docs

Author: OskarStark

notifier.rst

@@ -66,6 +66,7 @@ Infobip         ``symfony/infobip-notifier``          ``infobip://AUTH_TOKEN@HOS
 Iqsms           ``symfony/iqsms-notifier``            ``iqsms://LOGIN:PASSWORD@default?from=FROM``
 LightSms        ``symfony/light-sms-notifier``        ``lightsms://LOGIN:TOKEN@default?from=PHONE``
 MessageBird     ``symfony/message-bird-notifier``     ``messagebird://TOKEN@default?from=FROM``
+MessageMedia    ``symfony/message-media-notifier``    ``messagemedia://API_KEY:API_SECRET@default?from=FROM``
 Mobyt           ``symfony/mobyt-notifier``            ``mobyt://USER_KEY:ACCESS_TOKEN@default?from=FROM``
 Nexmo           ``symfony/nexmo-notifier``            ``nexmo://KEY:SECRET@default?from=FROM``
 Octopush        ``symfony/octopush-notifier``         ``octopush://USERLOGIN:APIKEY@default?from=FROM&type=TYPE``
@@ -91,6 +92,10 @@ Twilio          ``symfony/twilio-notifier``           ``twilio://SID:TOKEN@defau
     The Iqsms, GatewayApi, Octopush, AllMySms, Clickatell, SpotHit, FakeSms, LightSms, SmsBiuras
     and MessageBird integrations were introduced in Symfony 5.3.
 
+.. versionadded:: 5.4
+
+    The MessageMedia integration was introduced in Symfony 5.4.
+
 To enable a texter, add the correct DSN in your ``.env`` file and
 configure the ``texter_transports``: