[Typo]: cookiejar錯別字

### Python Version

3.13

### Docs Page

https://docs.python.org/zh-cn/3.13/library/http.cookiejar.html

### Original Translation

![Image](https://github.com/user-attachments/assets/06dd9d31-9d5a-4660-82a6-fca136bd264f)

### Original Docs Paragraph

当设置 cookie 是

### Suggested Fix

当设置 cookie 時