List GoogleChat in notifiers list

Author: GromNaN

notifier.rst

@@ -133,6 +133,7 @@ Service     Package                          DSN
 ==========  ===============================  ============================================
 Slack       ``symfony/slack-notifier``       ``slack://default/ID``
 Telegram    ``symfony/telegram-notifier``    ``telegram://TOKEN@default?channel=CHAT_ID``
+GoogleChat  ``symfony/googlechat-notifier``  ``googlechat://ACCESS_KEY:ACCESS_TOKEN@default/SPACE?threadKey=THREAD``
 Mattermost  ``symfony/mattermost-notifier``  ``mattermost://TOKEN@ENDPOINT?channel=CHANNEL``
 RocketChat  ``symfony/rocketchat-notifier``  ``rocketchat://TOKEN@ENDPOINT?channel=CHANNEL``
 ==========  ===============================  ============================================
@@ -143,6 +144,10 @@ RocketChat  ``symfony/rocketchat-notifier``  ``rocketchat://TOKEN@ENDPOINT?chann
     5.1. The Slack DSN changed in Symfony 5.1 to use Slack Incoming
     Webhooks instead of legacy tokens.
 
+.. versionadded:: 5.2
+
+    The GoogleChat integration was introduced in Symfony 5.2.
+
 Chatters are configured using the ``chatter_transports`` setting:
 
 .. code-block:: bash