Fix "No converter available for 'on_time'" for lights. Koenkk/zigbee2mqtt#12276

Author: Koenkk

converters/toZigbee.js

@@ -792,7 +792,7 @@ const converters = {
         },
     },
     light_onoff_brightness: {
-        key: ['state', 'brightness', 'brightness_percent'],
+        key: ['state', 'brightness', 'brightness_percent', 'on_time'],
         options: [exposes.options.transition()],
         convertSet: async (entity, key, value, meta) => {
             const {message} = meta;