fix: 修复sync命令无法同步js类型的翻译文件

[songning0605]

fileType为js时，kiwi --sync命令在同步语言文件时报错

sync 命令底层不支持同步 js 文件

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✅ songning0605
❌ songning06051014
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[twobin]

你好！邮件我已收到了，谢谢！！