docs: change issue report links in NotFound and Error pages to Korean docs repo

[wo-o29]

이슈 생성 링크 수정

• 404 페이지와 500 페이지 내 오류 제보 링크를 기존 영문 레포지토리에서 한국어 문서 레포지토리(https://github.com/reactjs/ko.react.dev/issues/new)로 변경했습니다.
• 한국어 문서에서 발생한 404, 500 오류이기 때문에 한국어 문서 이슈 생성 링크로 수정하여 접근성을 높였습니다.

필수 확인 사항

• 기여자 행동 강령 규약
• 기여 가이드라인
• 공통 스타일 가이드
• 번역 모범 사례
• 번역 용어 정리
• textlint 가이드
• 맞춤법 검사

선택 확인 사항

• 번역 초안 작성^{Draft Translation}
• 리뷰 반영^{Resolve Reviews}

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1 Skipped Deployment

Project	Deployment	Preview	Comments	Updated (UTC)
ko-legacy-reactjs-org	Ignored	Preview		Aug 26, 2025 8:18am

[lumirlumir]

LGTM. 기여 감사합니다!

[github-actions]

Size changes

📦 Next.js Bundle Analysis for undefined

This analysis was generated by the Next.js Bundle Analysis action. 🤖

Two Pages Changed Size

The following pages changed size from the code in this PR compared to its base branch:

Page	Size (compressed)	First Load
/404	130.54 KB (🟡 +2 B)	240.99 KB
/500	130.54 KB (🟡 +3 B)	240.99 KB

Details

Only the gzipped size is provided here based on an expert tip.

First Load is the size of the global bundle plus the bundle for the individual page. If a user were to show up to your website and land on a given page, the first load size represents the amount of javascript that user would need to download. If next/link is used, subsequent page loads would only need to download that page's bundle (the number in the "Size" column), since the global bundle has already been downloaded.

Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis

Next to the size is how much the size has increased or decreased compared with the base branch of this PR. If this percentage has increased by 10% or more, there will be a red status indicator applied, indicating that special attention should be given to this.