🔨 Set upload_command for CHEETAH v20 (#23515)

ini/stm32f4.ini

@@ -47,6 +47,7 @@ extends            = stm32_variant
 board              = marlin_FYSETC_CHEETAH_V20
 board_build.offset = 0x8000
 build_flags        = ${stm32_variant.build_flags} -DSTM32F401xC
+upload_command     = dfu-util -a 0 -s 0x08008000:leave -D "$SOURCE"
 
 #
 # FLYF407ZG