docs(Cwgo):update db tutorials version

[yuxialuozi]

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docs

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update db tutorials version

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更新了DB的文档

(Optional) More detailed description for this PR(en: English/zh: Chinese).

en:An sql_dir parameter has been added, and we can now specify a sql file or directory zh(optional): 增加了一个sql_dir参数，现在可以指定一个sql文件或者目录

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Name	Status	Preview	Comments	Updated (UTC)
cloudwego	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 7, 2024 3:00am

[GuangmingLuo]

Hi, there is no need to change * to -, it will both work in markdown. Please revert those changes.

[yuxialuozi]

Change completed