chore(deps-dev): bump @types/pg from 8.18.0 to 8.20.0 in /automation (#2646)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

automation/package.json

@@ -71,7 +71,7 @@
     "@types/k6": "1.7.0",
     "@types/lodash": "4.17.24",
     "@types/node": "25.3.5",
-    "@types/pg": "8.18.0",
+    "@types/pg": "8.20.0",
     "glob": "13.0.6",
     "ts-loader": "9.5.4",
     "tsx": "4.21.0",