Bump github.com/containerd/containerd from 1.6.18 to 1.6.26

Bumps [github.com/containerd/containerd](https://github.com/containerd/containerd) from 1.6.18 to 1.6.26.
- [Release notes](https://github.com/containerd/containerd/releases)
- [Changelog](https://github.com/containerd/containerd/blob/main/RELEASES.md)
- [Commits](containerd/containerd@v1.6.18...v1.6.26)

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

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

go.mod

@@ -3,17 +3,14 @@ module github.com/lf-edge/edge-containers
 go 1.15
 
 require (
-	github.com/containerd/containerd v1.6.18
+	github.com/containerd/containerd v1.6.26
 	github.com/gogo/googleapis v1.4.1 // indirect
-	github.com/google/uuid v1.3.0 // indirect
-	github.com/klauspost/compress v1.14.4 // indirect
-	github.com/moby/sys/mountinfo v0.6.0 // indirect
 	github.com/moby/sys/signal v0.7.0 // indirect
 	github.com/opencontainers/go-digest v1.0.0
-	github.com/opencontainers/image-spec v1.0.3-0.20211202183452-c5a74bcca799
-	github.com/sirupsen/logrus v1.8.1
+	github.com/opencontainers/image-spec v1.1.0-rc2.0.20221005185240-3a7f492d3f1b
+	github.com/sirupsen/logrus v1.9.3
 	github.com/spf13/cobra v1.2.1
-	github.com/stretchr/testify v1.7.0
+	github.com/stretchr/testify v1.8.4
 	oras.land/oras-go v1.1.0
 )