i18n(zh-CN): fix link to astro main doc

[Genteure]

What kind of changes does this PR include?

• Minor content fixes (broken links, typos, etc.)
• Changes or translations of Starlight docs site content

Description

Fixed a link in Chinese translation that was linking to the English main astro docs.

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Latest commit: 890c7d9

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[delucis]

Nice catch — thanks for the fix @Genteure!