chore(deps): bump actions/attest from 4.1.0 to 4.2.0 (#80)

Bumps [actions/attest](https://github.com/actions/attest) from 4.1.0 to 4.2.0.
- [Release notes](https://github.com/actions/attest/releases)
- [Changelog](https://github.com/actions/attest/blob/main/RELEASE.md)
- [Commits](actions/attest@59d8942...f7c74d2)

---
updated-dependencies:
- dependency-name: actions/attest
  dependency-version: 4.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build-provenance.yaml

@@ -31,7 +31,7 @@ jobs:
       - name: Write subject checksums to a file
         run: printf %s "${{ inputs.subject-checksums }}" >subject-checksums.txt
       - name: Attest
-        uses: actions/attest@59d89421af93a897026c735860bf21b6eb4f7b26 # v4.1.0
+        uses: actions/attest@f7c74d28b9d84cb8768d0b8ca14a4bac6ef463e6 # v4.2.0
         id: attest
         with:
           subject-checksums: subject-checksums.txt