@napi-rs/cli removed the --name option; the name is now read from the
napi.name field in package.json. Replace with --dir ./artifacts so the
command picks up the downloaded per-target .node files.

Also pins the second PyO3/maturin-action reference (inside the build
job) that was missed by the earlier action-modernization commit.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>