[DONE] Please change the edition languages of this book.

[DRM]

1️⃣ ISBN: 9791185584454 나는 4시간만 일한다 : 디지털 노마드 시대 완전히 새로운 삶의 방식
* Edition language: Korean

2️⃣ ASIN: B07YZKWF14 每周工作4小时
* Edition language: Simplified Chinese

3️⃣ ISBN: 9786046500087 The 4-hour Workweek in Vietnamese
* Edition language: Vietnamese

[Heejin]

1: Done. Also fixed author info.
2. There was no "Simplified Chinese" in the dropdown menu so I changed it to Chinese.
3. Done.

For 2 & 3, there seem to be some entries and covers missing, but I don't know Chinese and Vietnamese and don't know where to get them, so I just fixed the language info.