build(deps-dev): bump ts-jest in /clients/js-legacy

Bumps [ts-jest](https://github.com/kulshekhar/ts-jest) from 29.2.5 to 29.2.6.
- [Release notes](https://github.com/kulshekhar/ts-jest/releases)
- [Changelog](https://github.com/kulshekhar/ts-jest/blob/main/CHANGELOG.md)
- [Commits](kulshekhar/ts-jest@v29.2.5...v29.2.6)

---
updated-dependencies:
- dependency-name: ts-jest
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]