build(deps-dev): bump express from 5.1.0 to 5.2.0 (#617)

Bumps [express](https://github.com/expressjs/express) from 5.1.0 to 5.2.0.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@v5.1.0...v5.2.0)

---
updated-dependencies:
- dependency-name: express
  dependency-version: 5.2.0
  dependency-type: direct:development
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

playground/backend-integration/package.json

@@ -17,7 +17,7 @@
     "@types/react": "^19.1.8",
     "@types/react-dom": "^19.1.6",
     "@vitejs/plugin-react": "^4.7.0",
-    "express": "^5.1.0",
+    "express": "^5.2.0",
     "http-proxy-middleware": "^3.0.5",
     "typescript": "^5.8.3",
     "vite": "^7.1.11",