chore(deps-dev): bump chai from 4.5.0 to 6.2.0 in /blockchain

Bumps [chai](https://github.com/chaijs/chai) from 4.5.0 to 6.2.0.
- [Release notes](https://github.com/chaijs/chai/releases)
- [Changelog](https://github.com/chaijs/chai/blob/main/History.md)
- [Commits](chaijs/chai@v4.5.0...v6.2.0)

---
updated-dependencies:
- dependency-name: chai
  dependency-version: 6.2.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]