message: Update Thumbnail_API.md
diff: @@ -18,7 +18,7 @@ thumbnail = uobject.render_thumbnail([width, height, no_flush])
  This function generates a new FObjectThumbail from an object. By default texture streaming is flushed after the creation of the thumbnail. By specyfing 'no_flush' the streaming will not be flushed.
  -## The FObjectThumbail object
  +## The FObjectThumbnail object
  This class represents a thumbnail
  