docs: add FAQ for SWC plugin version unmatched

[chenjiahan]

Summary

Rspack's FAQ documentation is similar to React errors documentation or Next.js FAQ documentation, for example:

• https://react.dev/errors/421
• https://nextjs.org/docs/messages/react-hydration-error

Which means:

• The URL of the FAQ document is fixed and will not change.
• The URL of the FAQ document can be included in the Rspack core error logs

This PR adds https://rspack.dev/errors/swc-plugin-version for SWC Wasm plugins.

Checklist

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

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