homeassistant: only switch bathroom light when it is already on

Although the system now knows whether the bathroom light is on, it switches the switch every time the light should be turned off regardless of if it's already off. Because this is a device running on battery that performs a physical movement this runs the battery out very fast. Adjust the system to only switch the light off if it thinks it's on, even though this has the potential for desyncs.

modules/services/homeassistant.nix

@@ -116,10 +116,7 @@ in
                   unique_id = "87a4cbb5-e5a7-44fd-9f28-fec2d6a62538";
                   value_template = "{{ states('sensor.bathroom_motion_sensor_illuminance_lux') | int > 500 }}";
                   turn_on = { service = "script.noop"; };
-                  turn_off = {
-                    service = "switch.turn_on";
-                    entity_id = "switch.bathroom_light";
-                  };
+                  turn_off = { service = "script.bathroom_light_switch_if_on"; };
                 };
               };
             }