build(deps-dev): bump http-proxy-middleware from 3.0.3 to 3.0.5 (#492)

Bumps [http-proxy-middleware](https://github.com/chimurai/http-proxy-middleware) from 3.0.3 to 3.0.5.
- [Release notes](https://github.com/chimurai/http-proxy-middleware/releases)
- [Changelog](https://github.com/chimurai/http-proxy-middleware/blob/master/CHANGELOG.md)
- [Commits](chimurai/http-proxy-middleware@v3.0.3...v3.0.5)

---
updated-dependencies:
- dependency-name: http-proxy-middleware
  dependency-version: 3.0.5
  dependency-type: direct:development
...

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playground/backend-integration/package.json

@@ -18,7 +18,7 @@
     "@types/react-dom": "^19.0.4",
     "@vitejs/plugin-react": "^4.3.4",
     "express": "^4.21.2",
-    "http-proxy-middleware": "^3.0.3",
+    "http-proxy-middleware": "^3.0.5",
     "typescript": "^5.7.3",
     "vite": "^6.1.5",
     "vite-plugin-checker": "workspace:*"