Fix mistake in switch case for parsing Heif4CharCode.Av1C

src/ImageSharp/Formats/Heif/HeifDecoderCore.cs

@@ -470,15 +470,15 @@ internal sealed class HeifDecoderCore : IImageDecoderInternals
                         this.metadata.IccProfile = new IccProfile(iccData);
                     }
 
+                    break;
+                case Heif4CharCode.Av1C:
+                    this.av1CodecConfiguration = new(boxBuffer);
                     break;
                 case Heif4CharCode.Altt:
                 case Heif4CharCode.Imir:
                 case Heif4CharCode.Irot:
                 case Heif4CharCode.Iscl:
                 case Heif4CharCode.HvcC:
-                case Heif4CharCode.Av1C:
-                    this.av1CodecConfiguration = new(boxBuffer);
-                    break;
                 case Heif4CharCode.Rloc:
                 case Heif4CharCode.Udes:
                     // TODO: Implement