chore(deps): bump qs and express in /playground/www (#754)

Bumps [qs](https://github.com/ljharb/qs) and [express](https://github.com/expressjs/express). These dependencies needed to be updated together.

Updates `qs` from 6.14.2 to 6.15.2
- [Changelog](https://github.com/ljharb/qs/blob/main/CHANGELOG.md)
- [Commits](ljharb/qs@v6.14.2...v6.15.2)

Updates `express` from 4.22.1 to 4.22.2
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/v4.22.2/History.md)
- [Commits](expressjs/express@v4.22.1...v4.22.2)

---
updated-dependencies:
- dependency-name: qs
  dependency-version: 6.15.2
  dependency-type: indirect
- dependency-name: express
  dependency-version: 4.22.2
  dependency-type: indirect
...

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

Author: dependabot[bot]