Bump actions/attest-build-provenance from 3 to 4 (#401)

Author: dependabot[bot]

.github/workflows/test.yml

@@ -152,7 +152,7 @@ jobs:
           pattern: cibw-*
           path: dist
           merge-multiple: true
-      - uses: actions/attest-build-provenance@v3
+      - uses: actions/attest-build-provenance@v4
         with:
           subject-path: 'dist/**/*'