Grant attestation write access - CI/CD pipeline

.github/workflows/pypi_build_publish_template.yaml

@@ -14,6 +14,7 @@ jobs:
       name: production
     permissions:
       id-token: write  # IMPORTANT: this permission is mandatory for trusted publishing
+      attestations: write  # IMPORTANT: necessary to persist the attestation
     steps:
       - uses: actions/checkout@v4
       - name: Setup python 3.8