build(deps): bump actions/attest-build-provenance from 3.1.0 to 3.2.0

Bumps [actions/attest-build-provenance](https://github.com/actions/attest-build-provenance) from 3.1.0 to 3.2.0.
- [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@00014ed...96278af)

---
updated-dependencies:
- dependency-name: actions/attest-build-provenance
  dependency-version: 3.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ubuntu-cross.yml

@@ -53,7 +53,7 @@ jobs:
           no-cache: ${{ github.event_name == 'workflow_dispatch' }}
 
       - name: Attest provenance
-        uses: actions/attest-build-provenance@00014ed6ed5efc5b1ab7f7f34a39eb55d41aa4f8 # v3.1.0
+        uses: actions/attest-build-provenance@96278af6caaf10aea03fd8d33a09a777ca52d62f # v3.2.0
         with:
           subject-name: ghcr.io/automattic/vip-codespaces/ubuntu-cross
           subject-digest: ${{ steps.push.outputs.digest }}