docs: add nexiona to companies that uses t3

[Nsttt]

✅ Checklist

• [x] I have followed every step in the contributing guide (updated 2022-10-06).
• [x] The PR title follows the convention we established conventional-commit
• [ ] I performed a functional test on my final commit

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: c0dc7282a02102f20167c2bb4a4add2aa76e2a8f

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[vercel[bot]]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated
create-t3-app	✅ Ready (Inspect)	Visit Preview	Nov 20, 2022 at 4:38AM (UTC)

[github-actions[bot]]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟢 Performance	100
🟢 Accessibility	100
🟢 Best practices	100
🟠 SEO	86
🟠 PWA	54

Lighthouse ran on https://create-t3-app-git-fork-nsttt-add-company-t3-oss.vercel.app/

[nexxeln]

Please run pnpm format

[Nsttt]

Done. Thanks !