Artifact Attestations now support multiple subjects

Artifact Attestations now supports attesting multiple subjects simultaneously. When the attest-build-provenance or attest-sbom actions create multiple attestations, a single attestation is created with references to each of the supplied subjects, rather than generating separate attestations for each artifact. This reduces the number of attestations that you need to create and manage. We published these changes as new versions of the respective actions. Please update your workflows to reference the new versions in order to leverage the new functionality.

Learn more about using Artifact Attestations to establish provenance for builds