chore(deps-dev): bump @types/pg in /reference-apps/typescript-api-first

Bumps [@types/pg](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/pg) from 8.16.0 to 8.18.0.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/pg)

---
updated-dependencies:
- dependency-name: "@types/pg"
  dependency-version: 8.18.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

reference-apps/typescript-api-first/package-lock.json

@@ -41,7 +41,7 @@
     "@types/express": "^5.0.6",
     "@types/jest": "^30.0.0",
     "@types/node": "^25.2.2",
-    "@types/pg": "^8.16.0",
+    "@types/pg": "^8.18.0",
     "@types/supertest": "^6.0.2",
     "@types/uuid": "^11.0.0",
     "jest": "^30.2.0",