fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-IP-6240864

package.json

@@ -27,7 +27,7 @@
     "express": "^4.18.1",
     "express-file-routing": "^3.0.3",
     "express-rate-limit": "^6.6.0",
-    "mongoose": "^6.6.5",
+    "mongoose": "^8.0.0",
     "prisma": "^5.4.2"
   },
   "devDependencies": {