build(deps-dev): bump chai from 6.2.0 to 6.2.1 in /clients/js-legacy

Bumps [chai](https://github.com/chaijs/chai) from 6.2.0 to 6.2.1.
- [Release notes](https://github.com/chaijs/chai/releases)
- [Changelog](https://github.com/chaijs/chai/blob/main/History.md)
- [Commits](chaijs/chai@v6.2.0...v6.2.1)

---
updated-dependencies:
- dependency-name: chai
  dependency-version: 6.2.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]