build(deps-dev): bump @types/pg from 8.18.0 to 8.20.0

Bumps [@types/pg](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/pg) from 8.18.0 to 8.20.0.
- [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: 8.20.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -31,7 +31,7 @@
   "devDependencies": {
     "@tailwindcss/postcss": "^4.2.2",
     "@types/node": "^25.5.0",
-    "@types/pg": "^8.18.0",
+    "@types/pg": "^8.20.0",
     "@types/react": "19.2.10",
     "@types/react-dom": "19.2.3",
     "@types/ws": "^8.18.1",