Reset position of the resized image stream in SkiaSharp resizer

Match the ImageSharp and Magick.NET resizer contributors which return
the result stream positioned at the start, so downstream consumers
read the bytes instead of getting an empty read at end-of-stream.

framework/src/Volo.Abp.Imaging.SkiaSharp/Volo/Abp/Imaging/SkiaSharpImageResizerContributor.cs

@@ -71,6 +71,7 @@ public class SkiaSharpImageResizerContributor : IImageResizerContributor, ITrans
             {
                 using var skData = image.Encode(codec.EncodedFormat, Options.Quality);
                 skData.SaveTo(memoryStream);
+                memoryStream.Position = 0;
                 return new ImageResizeResult<Stream>(memoryStream, ImageProcessState.Done);
             }
             catch