Bump vite and @vitejs/plugin-react in /frontend

Bumps [vite](https://github.com/vitejs/vite/tree/HEAD/packages/vite) and [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/tree/HEAD/packages/plugin-react). These dependencies needed to be updated together.

Updates `vite` from 5.4.21 to 8.1.4
- [Release notes](https://github.com/vitejs/vite/releases)
- [Changelog](https://github.com/vitejs/vite/blob/main/packages/vite/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite/commits/v8.1.4/packages/vite)

Updates `@vitejs/plugin-react` from 4.7.0 to 6.0.3
- [Release notes](https://github.com/vitejs/vite-plugin-react/releases)
- [Changelog](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite-plugin-react/commits/plugin-react@6.0.3/packages/plugin-react)

---
updated-dependencies:
- dependency-name: vite
  dependency-version: 8.1.4
  dependency-type: direct:development
- dependency-name: "@vitejs/plugin-react"
  dependency-version: 6.0.3
  dependency-type: direct:development
...

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

frontend/package.json

@@ -13,7 +13,7 @@
     "react-dom": "^18.3.1"
   },
   "devDependencies": {
-    "@vitejs/plugin-react": "^4.3.1",
-    "vite": "^5.4.2"
+    "@vitejs/plugin-react": "^6.0.3",
+    "vite": "^8.1.4"
   }
 }