[doc] text and layout optimization: docs/troubleshooting.md #86
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Signed-off-by: windsonsea haifeng.yao@daocloud.io
What type of PR is this?
/kind documentation
What this PR does / why we need it:
text and layout optimization, to make our doc official
Special notes for your reviewer:
Feel nice to learn native English from @rgrupesh @Arhell