✨ update notifications

automations/system/update.yaml

@@ -0,0 +1,11 @@
+# Example configuration.yaml entry
+- alias: "Update Available Notification"
+  trigger:
+    - platform: state
+      entity_id: binary_sensor.updater
+      from: "off"
+      to: "on"
+  action:
+    - service: notify.notify
+      data:
+        message: "Home Assistant {{ state_attr('binary_sensor.updater', 'newest_version') }} is available."