[20.10] update containerd binary to v1.6.12 (addresses CVE-2022-23471)

The twelfth patch release for containerd 1.6 contains a fix for CVE-2022-23471.

Notable Updates

- Fix goroutine leak during Exec in CRI plugin (GHSA-2qjp-425j-52j9)

full diff: containerd/containerd@v1.6.11...v1.6.12

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

hack/dockerfile/install/containerd.installer

@@ -15,7 +15,7 @@ set -e
 # the binary version you may also need to update the vendor version to pick up
 # bug fixes or new APIs, however, usually the Go packages are built from a
 # commit from the master branch.
-: "${CONTAINERD_VERSION:=v1.6.11}"
+: "${CONTAINERD_VERSION:=v1.6.12}"
 
 install_containerd() (
 	echo "Install containerd version $CONTAINERD_VERSION"