Update mysql connection query

[LucianLiu6]

📚 Context

https://github.com/streamlit/streamlit/pull/8581

https://github.com/streamlit/streamlit/pull/8581#issuecomment-2087559590 @sfc-gh-dmatthews

update the doc of above PR

🧠 Description of Changes

Revised:

Insert screenshot of your updated UI/code here

Current:

Insert screenshot of existing UI/code here

💥 Impact

Size:

• [ ] Small
• [ ] Not small

🌐 References

• [ ] Notion

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