add example image link

app.py

@@ -88,7 +88,7 @@ def infer(image_input, dst_height:str, dst_width:str):
 
 description = """In this space you can warp an image using perspective transform with the Kornia library as seen in [this tutorial](https://kornia-tutorials.readthedocs.io/en/latest/warp_perspective.html).
 
-1. Upload an image
+1. Upload an image (e.g. [this one](https://github.com/kornia/data/raw/main/bruce.png))
 2. Set 4 points into the image with your cursor, which define the area to warp
 3. Set a desired output size (or go with the default)
 4. Click Submit to run the demo