Update src/ImageSharp/Formats/Png/PngEncoder.cs

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

src/ImageSharp/Formats/Png/PngEncoder.cs

@@ -70,7 +70,7 @@ namespace SixLabors.ImageSharp.Formats.Png
         {
             using (var encoder = new PngEncoderCore(image.GetMemoryAllocator(), image.GetConfiguration(), new PngEncoderOptions(this)))
             {
-                await encoder.EncodeAsync(image, stream);
+                await encoder.EncodeAsync(image, stream).ConfigureAwait(false);
             }
         }
     }