build(deps): bump github.com/moby/buildkit from 0.10.0-rc2 to 0.10.0

Bumps [github.com/moby/buildkit](https://github.com/moby/buildkit) from 0.10.0-rc2 to 0.10.0.
- [Release notes](https://github.com/moby/buildkit/releases)
- [Commits](https://github.com/moby/buildkit/compare/v0.10.0-rc2...v0.10.0)

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

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

go.mod

@@ -17,7 +17,7 @@ require (
 	github.com/hashicorp/go-version v1.4.0
 	github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db
 	github.com/mitchellh/go-homedir v1.1.0
-	github.com/moby/buildkit v0.10.0-rc2
+	github.com/moby/buildkit v0.10.0
 	github.com/morikuni/aec v1.0.0
 	github.com/opencontainers/go-digest v1.0.0
 	github.com/opencontainers/image-spec v1.0.2