fix: upgrade pg from 8.15.6 to 8.16.0 (#2278)

Snyk has created this PR to upgrade pg from 8.15.6 to 8.16.0.

See this package in npm:
pg

See this project in Snyk:
https://app.snyk.io/org/baderdean/project/0f8e176b-5f8b-457c-96ec-ede2a65658a3?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

Author: baderdean

backend/package-lock.json

@@ -53,7 +53,7 @@
     "limiter": "^3.0.0",
     "nanoid": "^3.3.11",
     "nodemon": "^3.1.10",
-    "pg": "^8.15.6",
+    "pg": "^8.16.0",
     "pg-format": "^1.0.4",
     "postal-mime": "^2.4.3",
     "qs": "^6.14.0",