v3.0.1
Update readme to v3.xx
GRUB_BTRFS_CREATE_ONLY_HARMONIZED_ENTRIES="true"
Doesn't exist anymore
GRUB_BTRFS_IGNORE_SPECIFIC_PATH=("var/lib/docker" "nosnapshot")
Delete "nosnapshot" it is confusing
New option available :
GRUB_BTRFS_DISABLE="true"
(Disable grub-btrfs)