minor #17895 [Notifier] from is optional in Smsapi since 6.3 (SzymonKaminski)

This PR was merged into the 6.3 branch.

Discussion
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[Notifier] `from` is optional in Smsapi since 6.3

This PR aims to resolve #17893.
On a related note, would it be a good idea to put all optional parameters of DSNs in the table above in square brackets?

Commits
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2a34c8b [Notifier] `from` is optional in Smsapi since 6.3

Author: OskarStark

notifier.rst

@@ -117,6 +117,7 @@ Yunpian          ``symfony/yunpian-notifier``           ``yunpian://APIKEY@defau
 
     The Bandwith, iSendPro, Plivo, RingCentral and Termii integrations were introduced
     in Symfony 6.3.
+    The ``from`` option in ``Smsapi`` DSN is optional since Symfony 6.3.
 
 To enable a texter, add the correct DSN in your ``.env`` file and
 configure the ``texter_transports``: