fix: 更正字幕配置中的键名，从 art2ass 修改为 srt2ass

Author: AkimioJR

config/config.yaml.example

@@ -81,7 +81,7 @@ alist_strm:                                 # AlistStrm 相关配置（Strm 文
 
 subtitle:                                   # 字体相关设置（仅 Emby 支持）
   enable: true                              # 启用
-  art2ass: true                             # SRT 字幕转 ASS 字幕
+  srt2ass: true                             # SRT 字幕转 ASS 字幕
   ass_style:                                # SRT 字幕转 ASS 字幕使用的样式
     - "Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding"
     - "Style: Default,楷体,20,&H03FFFFFF,&H00FFFFFF,&H00000000,&H02000000,-1,0,0,0,100,100,0,0,1,1,0,2,10,10,10,1"