[lightwaverf] Fix write pin using input schema instead of output (#15525)

esphome/components/lightwaverf/__init__.py

@@ -28,7 +28,7 @@ CONFIG_SCHEMA = cv.Schema(
     {
         cv.GenerateID(): cv.declare_id(LIGHTWAVERFComponent),
         cv.Optional(CONF_READ_PIN, default=13): pins.internal_gpio_input_pin_schema,
-        cv.Optional(CONF_WRITE_PIN, default=14): pins.internal_gpio_input_pin_schema,
+        cv.Optional(CONF_WRITE_PIN, default=14): pins.internal_gpio_output_pin_schema,
     }
 ).extend(cv.polling_component_schema("1s"))