docs: Merge from release-3.2 to resolve differences.

Created by: patrickluoyu

Signed-off-by: Patrick-LuoYu patrickluo@yunify.com

What type of PR is this?

/kind documentation

What this PR does / why we need it:

Merge from release-3.2 to resolve differences.

Special notes for reviewers:

/assign @harrisonliu5 Please take a look. Thanks!

Does this PR introduced a user-facing change?

None