Update dependency mongoose to v7.8.3

Author: renovate[bot]

package.json

@@ -19,7 +19,7 @@
     "is-url": "1.2.4",
     "module-alias": "2.2.3",
     "moment": "2.30.1",
-    "mongoose": "7.7.0",
+    "mongoose": "7.8.3",
     "node-fetch": "2.7.0",
     "passport": "^0.6.0",
     "passport-discord": "0.1.4",