Bump @types/node from 18.19.42 to 20.14.12 in /api-functions-v4

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 18.19.42 to 20.14.12.
- [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:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

api-functions-v4/package.json

@@ -14,7 +14,7 @@
     "@azure/functions": "^4.0.0-alpha.7"
   },
   "devDependencies": {
-    "@types/node": "^18.x",
+    "@types/node": "^20.x",
     "typescript": "^4.0.0"
   },
   "main": "dist/src/functions/*.js"