deps(backend)(deps): Bump node-cron from 3.0.3 to 4.2.1 in /backend

Bumps [node-cron](https://github.com/merencia/node-cron) from 3.0.3 to 4.2.1.
- [Release notes](https://github.com/merencia/node-cron/releases)
- [Commits](node-cron/node-cron@v3.0.3...v4.2.1)

---
updated-dependencies:
- dependency-name: node-cron
  dependency-version: 4.2.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

backend/package.json

@@ -40,7 +40,7 @@
     "helmet": "^7.1.0",
     "jsonwebtoken": "^9.0.2",
     "morgan": "^1.10.0",
-    "node-cron": "^3.0.3",
+    "node-cron": "^4.2.1",
     "socket.io": "^4.7.4",
     "ws": "^8.16.0"
   },