build(deps): bump actions/attest-build-provenance from 3.2.0 to 4.0.0

Bumps [actions/attest-build-provenance](https://github.com/actions/attest-build-provenance) from 3.2.0 to 4.0.0.
- [Release notes](https://github.com/actions/attest-build-provenance/releases)
- [Changelog](https://github.com/actions/attest-build-provenance/blob/main/RELEASE.md)
- [Commits](96278af6ca...e4d4f7c39a)

---
updated-dependencies:
- dependency-name: actions/attest-build-provenance
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/artifacts.yaml

@@ -197,14 +197,14 @@ jobs:
 
       # TODO: uncomment when the action is working for non ghcr.io pushes. GH Issue: https://github.com/actions/attest-build-provenance/issues/80
       # - name: Generate build provenance attestation
-      #   uses: actions/attest-build-provenance@96278af6caaf10aea03fd8d33a09a777ca52d62f # v3.2.0
+      #   uses: actions/attest-build-provenance@e4d4f7c39adfa4c260fb5c147f0622000aa14b99 # v4.0.0
       #   with:
       #     subject-name: dexidp/dex
       #     subject-digest: ${{ steps.build.outputs.digest }}
       #     push-to-registry: true
 
       - name: Generate build provenance attestation
-        uses: actions/attest-build-provenance@96278af6caaf10aea03fd8d33a09a777ca52d62f # v3.2.0
+        uses: actions/attest-build-provenance@e4d4f7c39adfa4c260fb5c147f0622000aa14b99 # v4.0.0
         with:
           subject-name: ghcr.io/${{ github.repository }}
           subject-digest: ${{ steps.build.outputs.digest }}