Bump @types/node from 20.8.6 to 20.8.9 in /frontend (#27)

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 20.8.6 to 20.8.9.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

---
updated-dependencies:
- dependency-name: "@types/node"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

frontend/package.json

@@ -9,7 +9,7 @@
     "@testing-library/react": "^14.0.0",
     "@testing-library/user-event": "^14.5.1",
     "@types/jest": "^29.5.5",
-    "@types/node": "^20.8.6",
+    "@types/node": "^20.8.9",
     "@types/react": "^18.2.28",
     "@types/react-dom": "^18.2.13",
     "bootstrap": "^5.3.2",