Bump qs and express in /sandbox

Bumps [qs](https://github.com/ljharb/qs) to 6.14.2 and updates ancestor dependency [express](https://github.com/expressjs/express). These dependencies need to be updated together.


Updates `qs` from 6.9.6 to 6.14.2
- [Changelog](https://github.com/ljharb/qs/blob/main/CHANGELOG.md)
- [Commits](ljharb/qs@v6.9.6...v6.14.2)

Updates `express` from 5.0.0-beta.1 to 5.2.1
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@v5.0.0-beta.1...v5.2.1)

---
updated-dependencies:
- dependency-name: qs
  dependency-version: 6.14.2
  dependency-type: indirect
- dependency-name: express
  dependency-version: 5.2.1
  dependency-type: direct:production
...

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Author: dependabot[bot]