### What changes were proposed in this pull request?
Improve Celeborn document to fix typos, formats, unvalid link and unsynced default value of document. Meanwhile, the public interfaces of `shuffleclient.md` keep the consistent with `ShuffleClient`.
### Why are the changes needed?
There are some typos, formats, unvalid link and unsynced default value fixes in Celeborn document at present. Meanwhile, the public interfaces of `shuffleclient.md` is inconsistent with `ShuffleClient`.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
No.
Closes#2410 from SteNicholas/CELEBORN-1341.
Authored-by: SteNicholas <programgeek@163.com>
Signed-off-by: mingji <fengmingxiao.fmx@alibaba-inc.com>
8fbcbead48