Update src/ImageSharp/Image.Decode.cs

Co-authored-by: Brian Popow <38701097+brianpopow@users.noreply.github.com>

src/ImageSharp/Image.Decode.cs

@@ -165,7 +165,7 @@ namespace SixLabors.ImageSharp
                 return (null, null);
             }
 
-            Image img = await decoder.DecodeAsync(config, stream);
+            Image img = await decoder.DecodeAsync(config, stream).ConfigureAwait(false);
             return new FormattedImage(img, format);
         }