Add attestation permissions to publish-rust workflow (#436)

Author: lorisleiva

.github/workflows/publish-rust.yml

@@ -68,6 +68,8 @@ jobs:
     permissions:
       contents: write
       id-token: write
+      attestations: write
+      artifact-metadata: write
     with:
       sbpf-program-packages: "program"
       solana-cli-version: ${{ needs.set_env.outputs.SOLANA_CLI_VERSION }}