Bump pg from 8.11.3 to 8.11.5 in /frontend

Bumps [pg](https://github.com/brianc/node-postgres/tree/HEAD/packages/pg) from 8.11.3 to 8.11.5.
- [Changelog](https://github.com/brianc/node-postgres/blob/master/CHANGELOG.md)
- [Commits](https://github.com/brianc/node-postgres/commits/pg@8.11.5/packages/pg)

---
updated-dependencies:
- dependency-name: pg
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

frontend/package-lock.json

@@ -23,7 +23,7 @@
     "morgan": "^1.10.0",
     "node-fetch": "^3.3.2",
     "node-sass-middleware": "^1.1.0",
-    "pg": "^8.11.3",
+    "pg": "^8.11.5",
     "pug": "^3.0.2"
   },
   "devDependencies": {