Update index.md to fix issue #666

[node]

• Synchronize the Chinese version with the English version update by issue [Website Translation] Chinese (zh): Update the Chinese Maturity Model to Reflect the Changes in #660 #666
• Fix some typos
• Supplement the translation of TAB names and corresponding questions

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[hhiroshell]

@node Thank you for your work!
Could you do a favor and remove this line to delete the note at the top of the page?
The current Chinese maturity model has a note explaining that the translation has not been updated from the English version.

[node]

It's done.

[lianmakesthings]

Hi @node thank you so much for your work on this.
I believe we still need a review from a native speaker on this, is that right?

[node]

Hi @node thank you so much for your work on this.
I believe we still need a review from a native speaker on this, is that right?

That's right.