Bump oci-spec from 0.6.4 to 0.6.5

Bumps [oci-spec](https://github.com/containers/oci-spec-rs) from 0.6.4 to 0.6.5.
- [Release notes](https://github.com/containers/oci-spec-rs/releases)
- [Changelog](https://github.com/containers/oci-spec-rs/blob/main/release.md)
- [Commits](youki-dev/oci-spec-rs@v0.6.4...v0.6.5)

---
updated-dependencies:
- dependency-name: oci-spec
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>