i18n(zh): Update customization.mdx and configuration.md

[leovoon]

What kind of changes does this PR include?

Changes or translations of Starlight docs site content

Description

Update customization.mdx and configuration.md for

• add twitter new logo #752
• Add RSS icon #792
• Add Telegram icon #794

I'm taking part in Hacktoberfest 😎

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Latest commit: f3c1778

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Name	Status	Preview	Updated (UTC)
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[delucis]

Thank you for the contribution @leovoon!