Update example following #9957 (#10086)

Update example following updater changes in Home-Assistant #25418

source/_cookbook/notify_if__new_ha_release.markdown

@@ -15,34 +15,38 @@ notify:
     recipient: recipient@jabber.org
 
 automation:
-  - alias: Update notifications
+  - alias: Update notification
     trigger:
       - platform: state
-        entity_id: updater.updater
+        entity_id: binary_sensor.updater
+        from: 'off'
+        to: 'on'
     action:
-      service: notify.jabber
-      data:
-        message: 'There is a new Home Assistant release available.'
+      - service: notify.jabber
+        data:
+          message: 'There is a new Home Assistant release available.'
 ```
 
 You can use [templates](/topics/templating/) to include the release number of Home Assistant if you prefer. The following example sends a notification via [Pushbullet](/components/notify.pushbullet/) with the Home Assistant version in the message.
 
 ```yaml
 notify:
-  platform: pushbullet
-  api_key: 'YOUR_KEY_HERE'
-  name: pushbullet
+  - platform: pushbullet
+    api_key: 'YOUR_KEY_HERE'
+    name: pushbullet
 
 automation:
-  - alias: Update notifications
-  trigger:
-    - platform: state
-      entity_id: updater.updater
-  action:
-    service: notify.pushbullet
-    data_template: 
-      title: 'New Home Assistant Release'
-      target: 'YOUR_TARGET_HERE' #See Pushbullet integration for usage
-      message: "Home Assistant {% raw %} {{ states('updater.updater') }} {% endraw %} is now available."
+  - alias: Update notification
+    trigger:
+      - platform: state
+        entity_id: binary_sensor.updater
+        from: 'off'
+        to: 'on'
+    action:
+      - service: notify.pushbullet
+        data_template: 
+          title: 'New Home Assistant Release'
+          target: 'YOUR_TARGET_HERE' #See Pushbullet integration for usage
+          message: "Home Assistant {% raw %} {{ state_attr('binary_sensor.updater', 'newest_version') }} {% endraw %} is now available."
 ```