chore(deps): update actions/setup-node action to v4 (#472)

* chore(deps): update actions/setup-node action to v4

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

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Co-authored-by: danieljbruce <danieljbruce@users.noreply.github.com>