Bump vite from 6.4.1 to 6.4.2 in /frontend

Bumps [vite](https://github.com/vitejs/vite/tree/HEAD/packages/vite) from 6.4.1 to 6.4.2.
- [Release notes](https://github.com/vitejs/vite/releases)
- [Changelog](https://github.com/vitejs/vite/blob/v6.4.2/packages/vite/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite/commits/v6.4.2/packages/vite)

---
updated-dependencies:
- dependency-name: vite
  dependency-version: 6.4.2
  dependency-type: direct:development
...

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

frontend/package.json

@@ -29,7 +29,7 @@
     "tailwindcss": "^4.1.7",
     "prettier": "^3.8.1",
     "typescript": "~5.6.3",
-    "vite": "^6.3.5",
+    "vite": "^6.4.2",
     "vite-plugin-vue-devtools": "^7.7.6",
     "vue-tsc": "^2.1.10"
   }