Update dependency @vitejs/plugin-react to v5

Author: renovate[bot]

app/package.json

@@ -73,7 +73,7 @@
     "@types/react-dom": "^19.0.0",
     "@types/showdown": "^2.0.6",
     "@types/turndown": "^5.0.5",
-    "@vitejs/plugin-react": "^4.2.1",
+    "@vitejs/plugin-react": "^5.0.0",
     "jsdom": "^26.0.0",
     "openapi-typescript": "7.8.0",
     "tailwindcss": "^4.1.10",