Update example automation

Author: andrew-codechimp

README.md

@@ -11,6 +11,7 @@ Label State Helpers for Home Assistant
 You can create state, not state and numeric state helpers which provide a binary sensor that turns on if any entity with an assigned label matches the criteria you specify.
 
 An `entities` attribute is available which lists all entities that match the criteria.
+A `friendly_names` attribute is available which lists either the device (entity) names or just the entity name if the entity is not part of a device, for all entities that match the criteria.
 
 ## Example use cases
 
@@ -82,7 +83,7 @@ actions:
     data:
       message: >-
         Critical sensors are unavailable {{
-        state_attr('binary_sensor.critical_sensor_unavailable', 'entities') |
+        state_attr('binary_sensor.critical_sensor_unavailable', 'friendly_names') |
         join(', ') }}
 mode: single
 ```