docs: fixed numbered list

[mlodyoskar]

Closes

✅ Checklist

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

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Changelog

Fixed numbered list in docs for Vercel deployments section in Polish language.

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Screenshots

💯

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Name	Status	Preview	Comments	Updated
create-t3-app	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Feb 11, 2023 at 10:01AM (UTC)

[github-actions]

Hey t3-oss/translators!

This PR contains changes to your language. Please review the changes ❤️.

PL: @matibox, @Infiplaya, @PiotrekPKP

[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟠 Performance	83
🟢 Accessibility	100
🟢 Best practices	100
🟢 SEO	93
🟠 PWA	54

Lighthouse ran on https://create-t3-app-git-fork-mlodyoskar-next-t3-oss.vercel.app/