fix: subtitle file rename failure in collection

[KotaHv]

Fix

#391

---

另外还有两个问题：

• 当字幕没有语种信息时（[SumiSora][Tanakeda][02]x265_aac.ass）会命名失败，是否可将SubtitleFile.language类型改为Optional[str]？

• 关于非zh-tw|zh语种，因为语种信息一般是倒数第二个后缀（中二病也要谈恋爱！ - S01E01 - 邂逅的…邪王真眼.jpn.ass），代码是否可以改为：

from pathlib import Path

def get_subtitle_lang(subtitle_name: str) -> str:
    for key, value in SUBTITLE_LANG.items():
        for v in value:
            if v in subtitle_name.lower():
                return key
            
    suffixes = Path(subtitle_name).suffixes
    if len(suffixes) > 1:
        lang = suffixes[-2]
        return lang.lstrip(".")

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
auto-bangumi	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jan 24, 2024 3:20pm

[EstrellaXD]

Approved, thanks again.