Bump the pinia group across 1 directory with 2 updates

Bumps the pinia group with 2 updates in the /frontend directory: [pinia](https://github.com/vuejs/pinia) and [pinia-plugin-persistedstate](https://github.com/prazdevs/pinia-plugin-persistedstate).


Updates `pinia` from 2.1.7 to 2.2.4
- [Release notes](https://github.com/vuejs/pinia/releases)
- [Commits](https://github.com/vuejs/pinia/compare/pinia@2.1.7...pinia@2.2.4)

Updates `pinia-plugin-persistedstate` from 3.2.1 to 4.1.1
- [Release notes](https://github.com/prazdevs/pinia-plugin-persistedstate/releases)
- [Changelog](https://github.com/prazdevs/pinia-plugin-persistedstate/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prazdevs/pinia-plugin-persistedstate/compare/v3.2.1...v4.1.1)

---
updated-dependencies:
- dependency-name: pinia
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: pinia
- dependency-name: pinia-plugin-persistedstate
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: pinia
...

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

frontend/package.json

@@ -71,8 +71,8 @@
     "compression": "^1.7.4",
     "cross-env": "^7.0.3",
     "express": "^4.21.1",
-    "pinia": "^2.1.7",
-    "pinia-plugin-persistedstate": "^3.2.1",
+    "pinia": "^2.2.4",
+    "pinia-plugin-persistedstate": "^4.1.1",
     "sass": "^1.77.6",
     "sass-loader": "^14.2.1",
     "sirv": "^2.0.4",