community/containerd: disable mips64

we dont have go for mips64 on 3.12-stable

fixes commit 32c4f237 (community/containerd: security update to
1.4.4)

community/containerd/APKBUILD

@@ -8,7 +8,7 @@ pkgver=1.4.4
 pkgrel=0
 pkgdesc="An open and reliable container runtime"
 url="https://containerd.io"
-arch="all"
+arch="all !mips64"
 license="Apache-2.0"
 depends="runc"
 makedepends="btrfs-progs-dev go go-md2man libseccomp-dev"