after install msg changed.

sys-boot/zfsbootmenu/zfsbootmenu-3.1.0.ebuild

@@ -11,7 +11,7 @@ SRC_URI="https://github.com/zbm-dev/zfsbootmenu/archive/refs/tags/v${PV}.tar.gz
 
 LICENSE="MIT"
 SLOT="0"
-KEYWORDS="~amd64"
+KEYWORDS="~amd64 ~arm64"
 
 PATCHES=(
 	"${FILESDIR}"/${PN}-stub-location.patch
@@ -52,6 +52,9 @@ src_install() {
 
 pkg_postinst () {
 	elog "Please consult Gentoo wiki to configure the bootloader
-	https://wiki.gentoo.org/wiki/ZFS/rootfs#ZFSBootMenu"
+	https://wiki.gentoo.org/wiki/ZFS/ZFSBootMenu"
+	elog "To create an EFI image, an EFI stub loader is needed."
+	elog "To use the stub loader provided by systemdboot, enable
+	the boot and kernel-install USE flags for sys-apps/systemd-utils"
 }