chore(deps): bump @reduxjs/toolkit from 1.9.2 to 2.2.7 in /frontend

Bumps [@reduxjs/toolkit](https://github.com/reduxjs/redux-toolkit) from 1.9.2 to 2.2.7.
- [Release notes](https://github.com/reduxjs/redux-toolkit/releases)
- [Commits](https://github.com/reduxjs/redux-toolkit/compare/v1.9.2...v2.2.7)

---
updated-dependencies:
- dependency-name: "@reduxjs/toolkit"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

frontend/package.json

@@ -19,7 +19,7 @@
     ]
   },
   "dependencies": {
-    "@reduxjs/toolkit": "^1.9.2",
+    "@reduxjs/toolkit": "^2.2.7",
     "@vercel/analytics": "^0.1.10",
     "chart.js": "^4.4.4",
     "i18next": "^23.14.0",