fix: upgrade mongoose from 8.4.1 to 8.4.3

Snyk has created this PR to upgrade mongoose from 8.4.1 to 8.4.3.

See this package in npm:
mongoose

See this project in Snyk:
https://app.snyk.io/org/tuanicom/project/37045203-d79c-4568-837a-36d05a44dbb3?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

backend/package-lock.json

@@ -34,7 +34,7 @@
     "cors": "^2.8.5",
     "express": "^4.19.2",
     "express-async-handler": "^1.2.0",
-    "mongoose": "^8.4.1",
+    "mongoose": "^8.4.3",
     "morgan": "^1.10.0"
   },
   "devDependencies": {