docs: add NIO logo at built with rspack

[littleVege]

Summary

NIO has several projects now using rsbuild, wish to join "build with rspack"

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ littleVege
❌ di.cai

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[chenjiahan]

Thanks! We are pleased that NIO is using Rspack and Rsbuild.