Bump mongoose from 8.10.1 to 8.15.1 in /server (#64)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Ben Elferink <ben.elferink@icloud.com>

server/package.json

@@ -16,7 +16,7 @@
     "express": "^4.21.2",
     "joi": "^17.13.3",
     "jsonwebtoken": "^9.0.2",
-    "mongoose": "^8.10.1"
+    "mongoose": "^8.15.1"
   },
   "devDependencies": {
     "@types/bcrypt": "^5.0.2",