[CI] Improve Docs CI Efficiency

[shuaills]

Motivation

#3265

Modifications

Checklist

• Format your code according to the Code Formatting with Pre-Commit.
• Add unit tests as outlined in the Running Unit Tests.
• Update documentation / docstrings / example tutorials as needed, according to Writing Documentation.
• Provide throughput / latency benchmark results and accuracy evaluation results as needed, according to Benchmark and Profiling and Accuracy Results.
• For reviewers: If you haven't made any contributions to this PR and are only assisting with merging the main branch, please remove yourself as a co-author when merging the PR.
• Please feel free to join our Slack channel at https://slack.sglang.ai to discuss your PR.

[zhaochenyang20]

Great job!

[FrankLeeeee]

🤔 do we really want to include CI logic in the docs? I am afraid that it might confuse some users since not everyone knows what CI is.

[zhaochenyang20]

I think we do not have better way 😂