[Notifier] Add Pushy docs

Author: stloyd

notifier.rst

@@ -453,11 +453,16 @@ Service          Package                               DSN
 `OneSignal`_     ``symfony/one-signal-notifier``       ``onesignal://APP_ID:API_KEY@default?defaultRecipientId=DEFAULT_RECIPIENT_ID``
 `PagerDuty`_     ``symfony/pager-duty-notifier``       ``pagerduty://TOKEN@SUBDOMAIN``
 `Pushover`_      ``symfony/pushover-notifier``         ``pushover://USER_KEY:APP_TOKEN@default``
+`Pushy`_         ``symfony/pushy-notifier``            ``pushy://API_KEY@default``
 ===============  ====================================  ==============================================================================
 
 To enable a texter, add the correct DSN in your ``.env`` file and
 configure the ``texter_transports``:
 
+.. versionadded:: 7.1
+
+    The `Pushy`_ integration was introduced in Symfony 7.1.
+
 .. code-block:: bash
 
     # .env
@@ -1019,6 +1024,7 @@ is dispatched. Listeners receive a
 .. _`PagerDuty`: https://github.com/symfony/symfony/blob/{version}/src/Symfony/Component/Notifier/Bridge/PagerDuty/README.md
 .. _`Plivo`: https://github.com/symfony/symfony/blob/{version}/src/Symfony/Component/Notifier/Bridge/Plivo/README.md
 .. _`Pushover`: https://github.com/symfony/symfony/blob/{version}/src/Symfony/Component/Notifier/Bridge/Pushover/README.md
+.. _`Pushy`: https://github.com/symfony/symfony/blob/{version}/src/Symfony/Component/Notifier/Bridge/Pushy/README.md
 .. _`Redlink`: https://github.com/symfony/symfony/blob/{version}/src/Symfony/Component/Notifier/Bridge/Redlink/README.md
 .. _`RFC 3986`: https://www.ietf.org/rfc/rfc3986.txt
 .. _`RingCentral`: https://github.com/symfony/symfony/blob/{version}/src/Symfony/Component/Notifier/Bridge/RingCentral/README.md