message: fix light_dimmers template to use lowercase values
diff: @@ -177,7 +177,7 @@ module.exports = {
  schema: 'template',
  brightness_template: '{{ (value_json.value / 99 * 255) | round(0) }}',
  state_topic: true,
  - state_template: '{{ "OFF" if value_json.value == 0 else "ON" }}',
  + state_template: '{{ "off" if value_json.value == 0 else "on" }}',
  command_topic: true,
  command_on_template: '{{ ((brightness / 255 * 99) | round(0)) if brightness is defined else 255 }}',
  command_off_template: '0'
  