chore(deps): bump actions/attest-build-provenance

Bumps the github-actions group with 1 update: [actions/attest-build-provenance](https://github.com/actions/attest-build-provenance).


Updates `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](actions/attest-build-provenance@v2.0.1...7668571)

---
updated-dependencies:
- dependency-name: actions/attest-build-provenance
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/release-mockotlpserver.yml

@@ -63,7 +63,7 @@ jobs:
           tags: ${{ steps.docker-meta.outputs.tags }}
           labels: ${{ steps.docker-meta.outputs.labels }}
       - name: Attest Docker image
-        uses: actions/attest-build-provenance@c4fbc648846ca6f503a13a2281a5e7b98aa57202  # v2.0.1
+        uses: actions/attest-build-provenance@7668571508540a607bdfd90a87a560489fe372eb  # v2.1.0
         with:
           subject-name: ${{ env.DOCKER_IMAGE_NAME }}
           subject-digest: ${{ steps.docker-push.outputs.digest }}