Bump github.com/docker/docker (#1100)

Bumps [github.com/docker/docker](https://github.com/docker/docker) from 20.10.7+incompatible to 20.10.8+incompatible.
- [Release notes](https://github.com/docker/docker/releases)
- [Changelog](https://github.com/moby/moby/blob/master/CHANGELOG.md)
- [Commits](moby/moby@v20.10.7...v20.10.8)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/containerd/stargz-snapshotter/estargz v0.7.0
 	github.com/docker/cli v20.10.7+incompatible
 	github.com/docker/distribution v2.7.1+incompatible
-	github.com/docker/docker v20.10.7+incompatible
+	github.com/docker/docker v20.10.8+incompatible
 	github.com/docker/docker-credential-helpers v0.6.3 // indirect
 	github.com/docker/go-connections v0.4.0 // indirect
 	github.com/google/go-cmp v0.5.6

vendor/modules.txt

@@ -28,7 +28,7 @@ github.com/docker/distribution/digestset
 github.com/docker/distribution/reference
 github.com/docker/distribution/registry/api/errcode
 github.com/docker/distribution/registry/client/auth/challenge
-# github.com/docker/docker v20.10.7+incompatible
+# github.com/docker/docker v20.10.8+incompatible
 ## explicit
 github.com/docker/docker/api
 github.com/docker/docker/api/types