stale doc string

zha/application/platforms/fan/__init__.py

@@ -347,7 +347,7 @@ async def _async_set_fan_mode(self, fan_mode: int) -> None:
         self.maybe_emit_state_changed_event()
 
     def update(self, _: Any = None) -> None:
-        """Attempt to retrieve on off state from the fan."""
+        """Query all members and determine the fan group state."""
         self.debug("Updating fan group entity state")
         platform_entities = self._group.get_platform_entities(self.PLATFORM)
         all_states = [entity.state for entity in platform_entities]