Bump @types/node from 20.6.3 to 20.12.11 in /node/pnpm-fastify

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 20.6.3 to 20.12.11.
- [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-minor
...

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

Author: dependabot[bot]

node/pnpm-fastify/package.json

@@ -16,7 +16,7 @@
     "source-map-support": "^0.5.21"
   },
   "devDependencies": {
-    "@types/node": "^20.5.7",
+    "@types/node": "^20.12.11",
     "prettier": "^3.0.3",
     "prettier-plugin-organize-imports": "^3.2.3",
     "prettier-plugin-pkg": "^0.18.1",