⬆️👨‍💻 Update actions/attest-build-provenance action to v2.1.0 (#346)

Author: renovate[bot]

.github/workflows/cd.yml

@@ -33,7 +33,7 @@ jobs:
           path: dist
           merge-multiple: true
       - name: Generate artifact attestation for sdist and wheel(s)
-        uses: actions/attest-build-provenance@v2.0.1
+        uses: actions/attest-build-provenance@v2
         with:
           subject-path: "dist/*"
       - uses: pypa/gh-action-pypi-publish@release/v1