trivial: fix the grub configuration from 684bc03 fixes #3685
trivial: fix the grub configuration from 684bc03
fixes #3685

fwupd/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,hughsie/fwupd