docs: mdx-js is using v2 for next edition

[jhcao23]

mdx is using v2

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[netlify]

✅ [V2]

Built without sensitive environment variables

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[github-actions]

⚡️ Lighthouse report for the deploy preview of this PR

URL	Performance	Accessibility	Best Practices	SEO	PWA	Report
/	🟠 58	🟢 97	🟠 83	🟢 100	🟢 90	Report
/docs/installation	🟠 74	🟢 100	🟢 92	🟢 100	🟢 90	Report

[slorber]

Thanks 👍