Update src/ImageSharp/Image.FromStream.cs

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

src/ImageSharp/Image.FromStream.cs

@@ -675,7 +675,7 @@ namespace SixLabors.ImageSharp
                     stream.Position = 0;
                 }
 
-                return await action(stream);
+                return await action(stream).ConfigureAwait(false);
             }
 
             using (var memoryStream = new MemoryStream()) // should really find a nice way to use a pool for these!!