Document FIDO2 LUKS unlock

[travier]

See: https://unix.stackexchange.com/questions/705795/fido2-yubikey-to-unlock-luks-at-boot-on-fedora-36-not-working

Step one.
systemd-cryptenroll --fido2-device=auto --fido2-with-user-verification=false --fido2-with-client-pin=false /dev/sda3
fill in where appropriate.
Step two.
    Modify /etc/crypttab.
vim /etc/crypttab
Modify so it looks like this.
luks-a6c32afd-3c35-4628-8653-5be499eaf0ce UUID=a6c32afd-3c35-4628-8653-5be499eaf0ce - fido2-device=auto
Step three.
sudo rpm-ostree initramfs --enable --arg='--add' --arg='fido2'
 
This worked with current Kinoite with a Yubikey.