chore(deps): bump actions/attest-build-provenance from 2.0.1 to 2.1.0 (#4216)

Bumps [actions/attest-build-provenance](https://github.com/actions/attest-build-provenance) from 2.0.1 to 2.1.0.
- [Release notes](https://github.com/actions/attest-build-provenance/releases)
- [Changelog](https://github.com/actions/attest-build-provenance/blob/main/RELEASE.md)
- [Commits](https://github.com/actions/attest-build-provenance/compare/c4fbc648846ca6f503a13a2281a5e7b98aa57202...7668571508540a607bdfd90a87a560489fe372eb)

---
updated-dependencies:
- dependency-name: actions/attest-build-provenance
  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>

.github/workflows/helm.yml

@@ -157,7 +157,7 @@ jobs:
           done
 
       - name: Generate provenance attestation and push to OCI registry
-        uses: actions/attest-build-provenance@c4fbc648846ca6f503a13a2281a5e7b98aa57202 # v2.0.1
+        uses: actions/attest-build-provenance@7668571508540a607bdfd90a87a560489fe372eb # v2.1.0
         with:
           push-to-registry: true
           subject-name: ${{ steps.push_chart.outputs.registry }}/${{ steps.push_chart.outputs.chart_name }}