docs: react-editor 가이드 문서 수정

[CreatiCoding]

Please check if the PR fulfills these requirements

• It's the right issue type on the title
• When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)
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• It does not introduce a breaking change or has a description of the breaking change

Description

초초마이너 문서 변경 요청입니다. 가이드대로만 설치하면 오류가 납니다. 오해를 줄이고자 설치 커맨드만 실행해도 문제 없도록 고쳐봤습니다.