build(deps-dev): bump mocha from 11.3.0 to 11.4.0 in /clients/js-legacy (#454)

Bumps [mocha](https://github.com/mochajs/mocha) from 11.3.0 to 11.4.0.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/main/CHANGELOG.md)
- [Commits](mochajs/mocha@v11.3.0...v11.4.0)

---
updated-dependencies:
- dependency-name: mocha
  dependency-version: 11.4.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]