build(deps): bump github.com/containerd/containerd from 1.6.1 to 1.6.6

Bumps [github.com/containerd/containerd](https://github.com/containerd/containerd) from 1.6.1 to 1.6.6.
- [Release notes](https://github.com/containerd/containerd/releases)
- [Changelog](https://github.com/containerd/containerd/blob/main/RELEASES.md)
- [Commits](containerd/containerd@v1.6.1...v1.6.6)

---
updated-dependencies:
- dependency-name: github.com/containerd/containerd
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -4,15 +4,15 @@ go 1.16
 
 require (
 	github.com/Microsoft/go-winio v0.5.1
-	github.com/Microsoft/hcsshim v0.9.2
+	github.com/Microsoft/hcsshim v0.9.3
 	github.com/containerd/console v1.0.3
-	github.com/containerd/containerd v1.6.1
-	github.com/containerd/go-cni v1.1.3
+	github.com/containerd/containerd v1.6.6
+	github.com/containerd/go-cni v1.1.6
 	github.com/containerd/typeurl v1.0.2
 	github.com/containers/ocicrypt v1.1.5
 	github.com/gogo/protobuf v1.3.2
 	github.com/opencontainers/go-digest v1.0.0
-	github.com/opencontainers/image-spec v1.0.2
+	github.com/opencontainers/image-spec v1.0.3-0.20211202183452-c5a74bcca799
 	github.com/opencontainers/runtime-spec v1.0.3-0.20210326190908-1c3f411f0417
 	github.com/sirupsen/logrus v1.8.1
 	github.com/urfave/cli v1.22.2