chore(deps): bump github.com/containerd/containerd from 1.7.14 to 1.7.15 (#3112)

Bumps [github.com/containerd/containerd](https://github.com/containerd/containerd) from 1.7.14 to 1.7.15.
- [Release notes](https://github.com/containerd/containerd/releases)
- [Changelog](https://github.com/containerd/containerd/blob/main/RELEASES.md)
- [Commits](https://github.com/containerd/containerd/compare/v1.7.14...v1.7.15)

---
updated-dependencies:
- dependency-name: github.com/containerd/containerd
  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>

vendor/github.com/containerd/containerd/images/archive/exporter.go

@@ -471,6 +471,7 @@ func ociIndexRecord(manifests []ocispec.Descriptor) tarRecord {
 		Versioned: ocispecs.Versioned{
 			SchemaVersion: 2,
 		},
+		MediaType: ocispec.MediaTypeImageIndex,
 		Manifests: manifests,
 	}
 

vendor/github.com/containerd/containerd/version/version.go

@@ -23,7 +23,7 @@ var (
 	Package = "github.com/containerd/containerd"
 
 	// Version holds the complete version number. Filled in at linking time.
-	Version = "1.7.14+unknown"
+	Version = "1.7.15+unknown"
 
 	// Revision is filled with the VCS (e.g. git) revision being used to build
 	// the program at linking time.