chore(deps-dev): bump @types/node from 25.2.0 to 25.2.3 in /test/harness

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 25.2.0 to 25.2.3.
- [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-version: 25.2.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

test/harness/package-lock.json

@@ -12,7 +12,7 @@
   },
   "devDependencies": {
     "@github/copilot": "^0.0.409",
-    "@types/node": "^25.2.0",
+    "@types/node": "^25.2.3",
     "openai": "^6.17.0",
     "tsx": "^4.21.0",
     "typescript": "^5.9.3",