drivers: input: esp32: fix reference voltage assignment

Fixed a copy-paste error where `refl` configuration value was not
properly assigned.

Signed-off-by: Benjamin Cabé <[email protected]>

Author: kartben

drivers/input/input_esp32_touch_sensor.c

@@ -186,7 +186,7 @@ static int esp32_touch_sensor_init(const struct device *dev)
 #if defined(CONFIG_SOC_SERIES_ESP32)
 	touch_hal_volt_t volt = {
 		.refh = dev_cfg->href_microvolt_enum_idx,
-		.refh = dev_cfg->href_microvolt_enum_idx,
+		.refl = dev_cfg->lref_microvolt_enum_idx,
 		.atten = dev_cfg->href_atten_microvolt_enum_idx
 	};