[Docs] Translate scheduler tutorial (#466)

* [Doc] Translate scheduler doc

* Apply suggestions from code review

Co-authored-by: Qian Zhao <112053249+C1rN09@users.noreply.github.com>

* Update docs/en/tutorials/param_scheduler.md

Co-authored-by: Qian Zhao <112053249+C1rN09@users.noreply.github.com>

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>
Co-authored-by: Qian Zhao <112053249+C1rN09@users.noreply.github.com>