Bump mock-socket from 9.2.1 to 9.3.1 in /frontend

Bumps [mock-socket](https://github.com/thoov/mock-socket) from 9.2.1 to 9.3.1.
- [Release notes](https://github.com/thoov/mock-socket/releases)
- [Changelog](https://github.com/thoov/mock-socket/blob/master/CHANGELOG.md)
- [Commits](https://github.com/thoov/mock-socket/commits)

---
updated-dependencies:
- dependency-name: mock-socket
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

frontend/package.json

@@ -113,7 +113,7 @@
     "cypress": "^13.5.0",
     "cypress-fail-on-console-error": "~5.0.0",
     "cypress-wait-until": "^2.0.1",
-    "mock-socket": "~9.2.1",
+    "mock-socket": "~9.3.1",
     "start-server-and-test": "~2.0.0"
   },
   "scarfSettings": {