build(deps): bump github.com/docker/docker (#1167)

Bumps [github.com/docker/docker](https://github.com/docker/docker) from 20.10.15+incompatible to 20.10.16+incompatible.
- [Release notes](https://github.com/docker/docker/releases)
- [Changelog](https://github.com/moby/moby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/docker/docker/compare/v20.10.15...v20.10.16)

---
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>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/andreaskoch/go-fswatch v1.0.0
 	github.com/docker/cli v20.10.16+incompatible
 	github.com/docker/distribution v2.8.1+incompatible
-	github.com/docker/docker v20.10.15+incompatible
+	github.com/docker/docker v20.10.16+incompatible
 	github.com/go-git/go-billy/v5 v5.3.1
 	github.com/go-git/go-git/v5 v5.4.2
 	github.com/go-ini/ini v1.66.4