Bump actions/attest-build-provenance from 2.0.1 to 2.1.0

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](actions/attest-build-provenance@c4fbc64...7668571)

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

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

Author: dependabot[bot]

.github/workflows/release.yml

@@ -39,10 +39,10 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: "Sign .tar.gz"
-        uses: actions/attest-build-provenance@c4fbc648846ca6f503a13a2281a5e7b98aa57202 # v2.0.1
+        uses: actions/attest-build-provenance@7668571508540a607bdfd90a87a560489fe372eb # v2.1.0
         with:
           subject-path: "dist/*.tar.gz"
       - name: "Sign .deb"
-        uses: actions/attest-build-provenance@c4fbc648846ca6f503a13a2281a5e7b98aa57202 # v2.0.1
+        uses: actions/attest-build-provenance@7668571508540a607bdfd90a87a560489fe372eb # v2.1.0
         with:
           subject-path: "dist/*.deb"