ci: bump actions/attest-build-provenance from 2.1.0 to 3.0.0 (#95)

Bumps [actions/attest-build-provenance](https://github.com/actions/attest-build-provenance) from 2.1.0 to 3.0.0.
- [Release notes](https://github.com/actions/attest-build-provenance/releases)
- [Changelog](https://github.com/actions/attest-build-provenance/blob/main/RELEASE.md)
- [Commits](actions/attest-build-provenance@v2.1.0...v3.0.0)

---
updated-dependencies:
- dependency-name: actions/attest-build-provenance
  dependency-version: 3.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/cd.yml

@@ -49,7 +49,7 @@ jobs:
           path: dist
 
       - name: Generate artifact attestation for sdist and wheel
-        uses: actions/attest-build-provenance@v2.1.0
+        uses: actions/attest-build-provenance@v3.0.0
         with:
           subject-path: "dist/*"