Artifact Registry support for OCI specifications v1.1 is generally available in Docker format repositories

## Feature Artifact Registry support for [OCI specifications v1.1](https://github.com/opencontainers/image-spec) is [generally available](https://cloud.google.com/products/#product-launch-stages) in Docker format repositories. You can upload containerized metadata about another container image to Artifact Registry as an attachment. To learn more, see [Manage container metadata](https://cloud.google.com/artifact-registry/docs/docker/manage-metadata).