mod: rem FLASH.md flash instructions moved to README.md

Author: eigen-value

FLASH.md

@@ -44,10 +44,12 @@ Linux
 $ ./flash_firmware.sh -p <device port> <path-to-your-firmware>
 
 Windows
-> install.bat -p <device port> <path-to-your-firmware>
+> flash_firmware.bat -p <device port> <path-to-your-firmware>
 ```
 Answer `y` to flash firmware.
 
+Note: The -p parameter is optional
+
 <br>
 <br>