main/grub: wrong paths in "grub.post-upgrade" file
Two first paths in script should be /etc/default/grub
instead of /etc/grub/default
https://gitlab.alpinelinux.org/alpine/aports/blob/master/main/grub/grub.post-upgrade
Two first paths in script should be /etc/default/grub
instead of /etc/grub/default
https://gitlab.alpinelinux.org/alpine/aports/blob/master/main/grub/grub.post-upgrade