docs: minor fixes

[AyanavaKarmakar]

✅ 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

---

Changelog

• TailwindCSS => Tailwind CSS in landing page stack

• Added a space after ... to decongest.
• there's => there're. Lemme know if that's alright, will revert otherwise.

Screenshots

• Before

• After

• Before

• After

💯

[changeset-bot]

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Latest commit: e844c38

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[vercel]

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Name	Status	Preview	Updated
create-t3-app	✅ Ready (Inspect)	Visit Preview	Nov 16, 2022 at 1:33PM (UTC)

[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟢 Performance	100
🟢 Accessibility	98
🟢 Best practices	93
🟠 SEO	86
🟠 PWA	54

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

[nexxeln]

Just make it there there are. Rest looks good