Update PngEncoder.cs

src/ImageSharp/Formats/Png/PngEncoder.cs

@@ -72,11 +72,13 @@ namespace SixLabors.ImageSharp.Formats.Png
         /// <param name="image">The <see cref="Image{TPixel}"/> to encode from.</param>
         /// <param name="stream">The <see cref="Stream"/> to encode the image data to.</param>
         /// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
-        public Task EncodeAsync<TPixel>(Image<TPixel> image, Stream stream)
+        public async Task EncodeAsync<TPixel>(Image<TPixel> image, Stream stream)
             where TPixel : unmanaged, IPixel<TPixel>
         {
-            using var encoder = new PngEncoderCore(image.GetMemoryAllocator(), image.GetConfiguration(), new PngEncoderOptions(this));
-            return encoder.EncodeAsync(image, stream);
+            using (var encoder = new PngEncoderCore(image.GetMemoryAllocator(), image.GetConfiguration(), new PngEncoderOptions(this)))
+            {
+                await encoder.EncodeAsync(image, stream).ConfigureAwait(false);
+            }
         }
     }
 }