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] <support@github.com>

.github/workflows/publish.yml

@@ -61,7 +61,7 @@ jobs:
         path: dist
 
     - name: Generate artifact attestation for sdist and wheel
-      uses: actions/attest-build-provenance@v1
+      uses: actions/attest-build-provenance@v2
       with:
         subject-path: dist
 
@@ -84,7 +84,7 @@ jobs:
         path: dist
 
     - name: Generate artifact attestation for sdist and wheel
-      uses: actions/attest-build-provenance@v1
+      uses: actions/attest-build-provenance@v2
       with:
         subject-path: dist