Fix order of return values in docstring for `fn`

This PR fixes the order of return values in docstring for `fn`, which is particularly important when this Space is used as an MCP tool so that MCP clients know which image to use

app.py

@@ -35,8 +35,8 @@ def fn(image: Union[Image.Image, str]) -> Tuple[Image.Image, Image.Image]:
 
     Returns:
         tuple:
-            - processed_image (PIL.Image): The input image with the background removed and transparency applied.
             - origin (PIL.Image): The original RGB image, unchanged.
+            - processed_image (PIL.Image): The input image with the background removed and transparency applied.
     """
     im = load_img(image, output_type="pil")
     im = im.convert("RGB")