Update devdependency @rollup/plugin-node-resolve to v9

Editor assessment

The subject identifies the exact devdependency and its new major — @rollup/plugin-node-resolve to v9 — satisfying clarity without the diff. The chore(deps) classification is correct, the imperative verb is clean, and the Co-authored-by trailer is grammatical and meaningful. The bodyless form is acceptable and permitted for a routine build-tooling bump, and no footer is required since nothing breaks. What the major jump changes for resolution behavior is left to release notes, which is the standard information gap for automated bumps and holds this tidy, correct message at good.