Bump qs, body-parser and express in /samples/spa-client

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

Updates `qs` from 6.13.0 to 6.14.1
- [Changelog](https://github.com/ljharb/qs/blob/main/CHANGELOG.md)
- [Commits](ljharb/qs@v6.13.0...v6.14.1)

Updates `body-parser` from 1.20.3 to 1.20.4
- [Release notes](https://github.com/expressjs/body-parser/releases)
- [Changelog](https://github.com/expressjs/body-parser/blob/master/HISTORY.md)
- [Commits](expressjs/body-parser@1.20.3...1.20.4)

Updates `express` from 4.21.1 to 4.22.1
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/v4.22.1/History.md)
- [Commits](expressjs/express@4.21.1...v4.22.1)

---
updated-dependencies:
- dependency-name: qs
  dependency-version: 6.14.1
  dependency-type: indirect
- dependency-name: body-parser
  dependency-version: 1.20.4
  dependency-type: indirect
- dependency-name: express
  dependency-version: 4.22.1
  dependency-type: indirect
...

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Author: dependabot[bot]