🌐 Update Korean translation for docs/ko/docs/tutorial/first-steps.md, docs/ko/docs/tutorial/index.md, docs/ko/docs/tutorial/path-params.md, and docs/ko/docs/tutorial/query-params.md

[SnowSuno]

I found some translations that doesn't go well with the english docs.
ex)
But when you want to make a query parameter required, you can just not declare any default value:
그러나 쿼리 매개변수를 필수로 만들려면 기본값을 선언할 수 없습니다:
Which actually means:
그러나 쿼리 매개변수를 필수로 만들려면 단순히 기본값을 선언하지 않으면 됩니다:

I also smoothened some awkward translations to make it easier to understand.

• Fixed mistranslations
• Updated "동작" to "작동" refering to 🇰🇷 Korean Translation Discussion #3167
• Smoothened awkward translations

Thank you always for your hard work.
related : #2017

[NinaHwang]

LGTM 🚀

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (cf73051) 100.00% compared to head (34956d6) 100.00%.
Report is 1248 commits behind head on master.

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@@            Coverage Diff             @@
##            master     #4218    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files          540       532     -8     
  Lines        13969     13672   -297     
==========================================
- Hits         13969     13672   -297     

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[github-actions]

📝 Docs preview for commit 34956d6 at: https://62a8480cab162c705ad73c97--fastapi.netlify.app

[tiangolo]

📝 Docs preview for commit 314a2d1 at: https://649a13c8b14d050fee045fd7--fastapi.netlify.app

[alejsdev]

Thanks for your contribution! @SnowSuno 🚀✨

And thanks for the help @NinaHwang 🤓