- Support for generating multi-subject attestations [#1864](https://github.com/actions/toolkit/pull/1865)
- Fix bug in `buildSLSAProvenancePredicate` related to `workflow_ref` OIDC token claims containing the "@" symbol in the tag name [#1863](https://github.com/actions/toolkit/pull/1863)
- Fix bug in `buildSLSAProvenancePredicate`/`attestProvenance` when generating provenance statement for enterprise account using customized OIDC issuer value [#1823](https://github.com/actions/toolkit/pull/1823)
- Add new `headers` parameter to the `attest` and `attestProvenance` functions [#1790](https://github.com/actions/toolkit/pull/1790)
- Update `buildSLSAProvenancePredicate`/`attestProvenance` to automatically derive default OIDC issuer URL from current execution context [#1796](https://github.com/actions/toolkit/pull/1796)
- Updates the `attestProvenance` function to retrieve a token from the GitHub OIDC provider and use the token claims to populate the provenance statement [#1693](https://github.com/actions/toolkit/pull/1693)