Bump lightgbm from 4.1.0 to 4.2.0 in /runtimes/lightgbm

Bumps [lightgbm](https://github.com/microsoft/LightGBM) from 4.1.0 to 4.2.0.
- [Release notes](https://github.com/microsoft/LightGBM/releases)
- [Commits](microsoft/LightGBM@v4.1.0...v4.2.0)

---
updated-dependencies:
- dependency-name: lightgbm
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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