[Notifier] Add Zulip entry

Author: phpfour

notifier.rst

@@ -125,14 +125,19 @@ The chat channel is used to send chat messages to users by using
 :class:`Symfony\\Component\\Notifier\\Chatter` classes. Symfony provides
 integration with these chat services:
 
-==========  ===============================  ============================================
+==========  ===============================  ================================================
 Service     Package                          DSN
-==========  ===============================  ============================================
+==========  ===============================  ================================================
 Slack       ``symfony/slack-notifier``       ``slack://default/ID``
 Telegram    ``symfony/telegram-notifier``    ``telegram://TOKEN@default?channel=CHAT_ID``
 Mattermost  ``symfony/mattermost-notifier``  ``mattermost://TOKEN@ENDPOINT?channel=CHANNEL``
 RocketChat  ``symfony/rocketchat-notifier``  ``rocketchat://TOKEN@ENDPOINT?channel=CHANNEL``
-==========  ===============================  ============================================
+Zulip       ``symfony/zulip-notifier``       ``zulip://EMAIL:APIKEY@ENDPOINT?channel=STREAM``
+==========  ===============================  ================================================
+
+.. versionadded:: 5.2
+
+    The Zulip integration was introduced in Symfony 5.2. 
 
 .. versionadded:: 5.1