Bump actions/attest

Bumps [actions/attest](https://github.com/actions/attest) from 281a49d4cbb0a72c9575a50d18f6deb515a11deb to 59d89421af93a897026c735860bf21b6eb4f7b26.
- [Release notes](https://github.com/actions/attest/releases)
- [Changelog](https://github.com/actions/attest/blob/main/RELEASE.md)
- [Commits](actions/attest@281a49d...59d8942)

---
updated-dependencies:
- dependency-name: actions/attest
  dependency-version: 59d89421af93a897026c735860bf21b6eb4f7b26
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/release.yml

@@ -136,7 +136,7 @@ jobs:
           uv run python scripts/verify_release_manifest.py dist/SHA256SUMS
 
       - name: Generate release artifact attestations
-        uses: actions/attest@281a49d4cbb0a72c9575a50d18f6deb515a11deb
+        uses: actions/attest@59d89421af93a897026c735860bf21b6eb4f7b26
         with:
           subject-path: |
             dist/SHA256SUMS