build(deps): bump github.com/docker/buildx from 0.8.1 to 0.8.2

Bumps [github.com/docker/buildx](https://github.com/docker/buildx) from 0.8.1 to 0.8.2.
- [Release notes](https://github.com/docker/buildx/releases)
- [Commits](https://github.com/docker/buildx/compare/v0.8.1...v0.8.2)

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

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

go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/Microsoft/go-winio v0.5.2
 	github.com/containerd/console v1.0.3
 	github.com/containerd/containerd v1.6.3-0.20220401172941-5ff8fce1fcc6
-	github.com/docker/buildx v0.8.1
+	github.com/docker/buildx v0.8.2
 	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