Bump express in the dev-dependencies group across 1 directory (#224)

Bumps the dev-dependencies group with 1 update in the / directory: [express](https://github.com/expressjs/express).


Updates `express` from 4.19.1 to 4.21.1
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.1/History.md)
- [Commits](expressjs/express@4.19.1...4.21.1)

---
updated-dependencies:
- dependency-name: express
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
...

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Author: dependabot[bot]