build(deps): bump github.com/docker/distribution

Bumps [github.com/docker/distribution](https://github.com/docker/distribution) from 2.8.0+incompatible to 2.8.1+incompatible.
- [Release notes](https://github.com/docker/distribution/releases)
- [Commits](https://github.com/docker/distribution/compare/v2.8.0...v2.8.1)

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

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

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/containerd/console v1.0.3
 	github.com/containerd/containerd v1.6.1
 	github.com/docker/buildx v0.6.2
-	github.com/docker/distribution v2.8.0+incompatible
+	github.com/docker/distribution v2.8.1+incompatible
 	github.com/emicklei/proto v1.9.0 // indirect
 	github.com/go-git/go-git/v5 v5.4.2
 	github.com/gofrs/flock v0.8.1