chore(deps): bump zx from 7.2.3 to 8.3.0 in /bin/njs

Bumps [zx](https://github.com/google/zx) from 7.2.3 to 8.3.0.
- [Release notes](https://github.com/google/zx/releases)
- [Commits](google/zx@7.2.3...8.3.0)

---
updated-dependencies:
- dependency-name: zx
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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