[Doc] Refine chinese doc (#516)

* refine chinese doc

* remove  in title

* Update docs/zh_cn/tutorials/param_scheduler.md

* fix link

* remove files from building docs

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>
Co-authored-by: zhouzaida <zhouzaida@163.com>