build(deps-dev): bump express from 5.0.1 to 5.1.0 in /docs/v3

Bumps [express](https://github.com/expressjs/express) from 5.0.1 to 5.1.0.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@5.0.1...v5.1.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]