Use Apple reccomended values for HLS CODECS

Jellyfin.Api/Helpers/HlsCodecStringHelpers.cs

@@ -19,12 +19,12 @@ public static class HlsCodecStringHelpers
     /// <summary>
     /// Codec name for AC-3.
     /// </summary>
-    public const string AC3 = "mp4a.a5";
+    public const string AC3 = "ac-3";
 
     /// <summary>
     /// Codec name for E-AC-3.
     /// </summary>
-    public const string EAC3 = "mp4a.a6";
+    public const string EAC3 = "ec-3";
 
     /// <summary>
     /// Codec name for FLAC.