update containerd binary to v1.6.13

Notable Updates

- Update overlay snapshotter to check for tmpfs when evaluating usage of userxattr
- Update hcsschim to v0.9.6 to fix resource leak on exec
- Make swapping disabled with memory limit in CRI plugin
- Allow clients to remove created tasks with PID 0
- Fix concurrent map iteration and map write in CRI port forwarding
- Check for nil HugepageLimits to avoid panic in CRI plugin

See the changelog for complete list of changes:
https://github.com/containerd/containerd/releases/tag/v1.6.13

full diff: https://github.com/containerd/containerd/compare/v1.6.12...v1.6.13

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.
-: "${CONTAINERD_VERSION:=v1.6.12}"
+: "${CONTAINERD_VERSION:=v1.6.13}"
 
 install_containerd() (
 	echo "Install containerd version $CONTAINERD_VERSION"