Migrate to C#12

Data/Codec.cs

@@ -35,7 +35,7 @@ internal static class CodecUtil
     /// </summary>
     public static readonly Dictionary<AVCodecID, List<int>> AvailableSampleRate = new()
     {
-        [AVCodecID.AV_CODEC_ID_AAC] = new List<int> { 44100, 48000, 96000 },
-        [AVCodecID.AV_CODEC_ID_OPUS] = new List<int> { 48000 }
+        [AVCodecID.AV_CODEC_ID_AAC] = [44100, 48000, 96000],
+        [AVCodecID.AV_CODEC_ID_OPUS] = [48000]
     };
 }