references non-existing script reform2-keyboard4-fw/download-fw.sh

In reform-handbook/hardware.html#keyboard-firmware it says:

For keyboard 4.0 (with RGB backlight), execute these commands:

git clone https://source.mnt.re/reform/reform
cd reform/reform2-keyboard4-fw
./download-fw.sh laptop-us
sudo ./flash.sh

But reform2-keyboard4-fw/download-fw.sh does not exist.