It was a small change. This is actually my first time even trying to do something to another one's github project. Just changed some text in the part where he thanks everyone for helping.
The WiFi is always blocked when I try to install Arch or do whatever in chroot from the flash drive and the rfkill command helps with that.
Maybe this will be helpful for someone else.
Some new users(which this script is targeted at) may not know how to stop a ping request and might get confused. This just adds a quick note that might some.