improve esp32_dev env

Author: netmindz

platformio.ini

@@ -458,7 +458,8 @@ board_build.flash_mode = dio
 
 [env:esp32dev_debug]
 extends = env:esp32dev
-build_unflags = -D WLED_RELEASE_NAME=\"ESP32_V4\"
+upload_speed = 921600
+build_unflags = -D WLED_RELEASE_NAME=\"ESP32\"
 build_flags = ${env:esp32dev.build_flags}
               -D WLED_DEBUG
               -D WLED_RELEASE_NAME=\"ESP32_DEBUG\"