docs: fix typos

[pgrimaud]

Hey 👋,

This PR will fix :

1 typo in docs/build/quick_start.md
3 typos in docs/learn/basic/why_db3.md

Best!

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PR-Codex overview

This PR focuses on fixing typos and improving the clarity of the documentation.

Detailed summary

• Fixed a typo in the file docs/build/quick_start.md by changing "Chosing" to "Choosing" in the heading.
• Fixed a typo in the file docs/learn/basic/why_db3.md by changing "syncronize" to "synchronize" in a sentence.
• Fixed a typo in the file docs/learn/basic/why_db3.md by changing "privte" to "private" in a sentence.
• Fixed a typo in the file docs/learn/basic/why_db3.md by changing "easilly" to "easily" in a sentence.

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}

[imotai]

thanks for the contribution

[imotai]

LGTM

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