Bump actions/attest-build-provenance from 1 to 2

Bumps [actions/attest-build-provenance](https://github.com/actions/attest-build-provenance) from 1 to 2.
- [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@v1...v2)

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

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

.github/workflows/publish_release.yaml

@@ -55,7 +55,7 @@ jobs:
           --user
       - name: Build Binary wheel Source Tarball
         run: python3 -m build
-      - uses: actions/attest-build-provenance@v1
+      - uses: actions/attest-build-provenance@v2
         with:
           subject-path: 'dist/gato_x-*'
       - name: Store Distribution Packages