Add rachio service to start multiple zones (#42092)

homeassistant/components/rachio/device.py

@@ -80,6 +80,10 @@ class RachioPerson:
         """Get a list of controllers managed by this account."""
         return self._controllers
 
+    def start_multiple_zones(self, zones) -> None:
+        """Start multiple zones."""
+        self.rachio.zone.start_multiple(zones)
+
 
 class RachioIro:
     """Represent a Rachio Iro."""