chore(deps): bump @types/node in /functions/newsletter

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 20.3.2 to 20.4.4.
- [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-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

functions/newsletter/package.json

@@ -15,7 +15,7 @@
   "license": "MIT",
   "dependencies": {
     "@netlify/functions": "^1.6.0",
-    "@types/node": "^20.3.2",
+    "@types/node": "^20.4.4",
     "node-fetch": "^3.3.0",
     "typescript": "^5.1.3"
   }