fix: typo "Contibute" → "Contribute" in site.json navigation

[Akankshaaaa-01]

Fixed a spelling typo in the navigation bar.
"Contibute" → "Contribute"

[vercel]

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Project	Deployment	Actions	Updated (UTC)
nodejs-learn	Ready	Preview	Jun 26, 2026 4:13am

[cursor]

PR Summary

Low Risk
Single display-string change in site config with no logic, routing, or security impact.

Overview
Fixes a spelling mistake in the main site navigation config so the GitHub contributing link shows Contribute instead of Contibute.

Only the text field for that nav item in site.json changes; the URL and other navigation entries are unchanged.

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[github-actions]

👋 Codeowner Review Request

The following codeowners have been identified for the changed files:

Team reviewers: @nodejs/nodejs-website

Please review the changes when you have a chance. Thank you! 🙏

[mikeesto]

LGTM, thanks!

[aymen94]

@Akankshaaaa-01 Congratulations on your first contribution! 🎉
Thanks for your pull request