main/mkinitfs: upgrade to 3.8.1

main/mkinitfs/APKBUILD

 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=mkinitfs
-pkgver=3.8.0
+pkgver=3.8.1
 # shellcheck disable=SC2034 # used for git versions, keep around for next time
 _ver=${pkgver%_git*}
-pkgrel=1
+pkgrel=0
 pkgdesc="Tool to generate initramfs images for Alpine"
 url="https://gitlab.alpinelinux.org/alpine/mkinitfs"
 arch="all"
@@ -38,5 +38,5 @@ package() {
 }
 
 sha512sums="
-0f9dc966dacc125c0dd15ec7f23c4204c8a10f2d8d6d38a867ad95e40de76f2622a49f5540f8cd510be538cc36c8aaafffd0f424b0e1320050a9d96775afe98c  mkinitfs-3.8.0.tar.gz
+f30398875f07c2dafc98ff6bbf82e8414c0f275b7ee7e6b6ae485c482b4f9f01175916b73c853df7a5528164e7f9cca574c7a67a668bf41cf74314dc3111a857  mkinitfs-3.8.1.tar.gz
 "