Arch fix EFI partition

If you have a dual-boot with windows sometimes the boot loader can be overwritten

Fix the partition and re-install kernel

Boot a live CD / USB

Replace with `nvme0n1` or the appropriate disk so the first mount command turns into `sudo mount /dev/nvme0n1p2 /mnt`.

sudo mount /dev/<disk>p2 /mnt
sudo mount /dev/<disk>p1 /mnt/efi
sudo arch-chroot /mnt
bootctl install
reinstall-kernels