Fix: After executing npm i --force locally, the login page cannot be opened #4290 (#4292)

### What problem does this PR solve?

Fix: After executing npm i --force locally, the login page cannot be
opened #4290

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

README_ko.md

@@ -286,7 +286,7 @@ docker build -f Dockerfile -t infiniflow/ragflow:nightly .
 6. 프론트엔드 의존성을 설치합니다:  
    ```bash
    cd web
-   npm install --force
+   npm install
    ```  
 7. 프론트엔드 서비스를 시작합니다:  
    ```bash