chore(deps): update dependency @types/node to v25.9.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@types/node (source)	25.4.0 → 25.9.4

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Note

Low Risk
Dev-only DefinitelyTyped package bump with no runtime or published action behavior changes.

Overview
Bumps the devDependency @types/node from 25.4.0 to 25.9.4 in package.json and package-lock.json.

The lockfile also updates transitive undici-types (7.18.x → 7.24.6) to match the new @types/node peer range. No application or action runtime code is modified—only TypeScript typings used for development/tooling.

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