feat: add sneaky example

app.py

@@ -22,7 +22,7 @@ def classify_image(img):
 # %% dogvscat.ipynb 7
 image = gr.inputs.Image(shape=(192,192))
 label = gr.outputs.Label()
-examples = ['dog.jpg', 'cat.jpg', 'dunno.jpg']
+examples = ['dog.jpg', 'cat.jpg', 'dunno.jpg', 'dunno2.jpg']
 
 intf = gr.Interface(fn=classify_image, inputs=image, outputs=label, examples=examples, title='Dog vs cat?')
 intf.launch(inline=False)