update board.txt

Author: qhddz

boards.txt

@@ -12736,7 +12736,7 @@ dfrobot_lorawan_esp32s3.build.target=esp32s3
 dfrobot_lorawan_esp32s3.build.mcu=esp32s3
 dfrobot_lorawan_esp32s3.build.core=esp32
 dfrobot_lorawan_esp32s3.build.variant=dfrobot_lorawan_esp32s3
-dfrobot_lorawan_esp32s3.build.board=ESP32S3_DEV
+dfrobot_lorawan_esp32s3.build.board=DFROBOT_LORAWAN_ESP32S3
 
 dfrobot_lorawan_esp32s3.build.usb_mode=1
 dfrobot_lorawan_esp32s3.build.cdc_on_boot=1