chore(deps): bump github.com/containerd/containerd from 1.5.9 to 1.6.6

Bumps [github.com/containerd/containerd](https:/containerd/containerd) from 1.5.9 to 1.6.6.
- [Release notes](https:/containerd/containerd/releases)
- [Changelog](https:/containerd/containerd/blob/main/RELEASES.md)
- [Commits](containerd/containerd@v1.5.9...v1.6.6)

---
updated-dependencies:
- dependency-name: github.com/containerd/containerd
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -4,22 +4,18 @@ go 1.13
 
 require (
  github.com/cenkalti/backoff/v4 v4.1.2
- github.com/containerd/containerd v1.5.13
+ github.com/containerd/containerd v1.6.6
  github.com/docker/docker v20.10.11+incompatible
  github.com/docker/go-connections v0.4.0
  github.com/docker/go-units v0.4.0
  github.com/go-redis/redis v6.15.9+incompatible
  github.com/go-sql-driver/mysql v1.6.0
- github.com/golang/protobuf v1.5.2 // indirect
  github.com/google/uuid v1.3.0
  github.com/magiconair/properties v1.8.5
  github.com/moby/sys/mount v0.2.0 // indirect
- github.com/moby/sys/mountinfo v0.5.0 // indirect
  github.com/moby/term v0.0.0-20210619224110-3f7ff695adc6
- github.com/morikuni/aec v0.0.0-20170113033406-39771216ff4c // indirect
- github.com/opencontainers/image-spec v1.0.2
+ github.com/opencontainers/image-spec v1.0.3-0.20211202183452-c5a74bcca799
  github.com/stretchr/testify v1.7.0
- golang.org/x/net v0.0.0-20211108170745-6635138e15ea // indirect
  golang.org/x/sys v0.0.0-20220412211240-33da011f77ad
  gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
  gotest.tools/gotestsum v1.7.0