Add title option to notify entity (#32576)

* Add title option to notify entity

* Update example

source/_integrations/notify.markdown

@@ -41,6 +41,7 @@ Integrations can also implement the notify entity platform. Entity platform impl
 | Service data attribute | Optional | Description |
 | ---------------------- | -------- | ----------- |
 | `message`              |       no | Body of the notification.
+| `title`                |      yes | Title of the notification.
 
 ## Companion app notifications
 
@@ -71,6 +72,7 @@ service: notify.send_message
 data:
   entity_id: notify.my_direct_message_notifier
   message: "You have an update!"
+  title: "Status changed"
 ```
 
 {% endraw %}