docs: update dfu-util command

To avoid #681

docs/32Blit-Firmware.md

diff --git a/docs/32Blit-Firmware.md b/docs/32Blit-Firmware.md
index 80d845a..3e56a46 100644
--- a/docs/32Blit-Firmware.md
+++ b/docs/32Blit-Firmware.md
@@ -85,7 +85,7 @@
 Install `dfu-util` from your package manager then enter:

 

 ```

-sudo dfu-util -a 0 -s 0x08000000 -D 32blit-stm32/firmware/firmware.bin

+sudo dfu-util -a 0 -D 32blit-stm32/firmware/firmware.dfu

 ```

 

 ### Windows