Update app.py

app.py

@@ -104,7 +104,7 @@ def sepia(input_img):
 demo = gr.Interface(fn=sepia,
                     inputs=gr.Image(shape=(400, 600)),
                     outputs=['plot'],
-                    examples=["cityscapes-1.jpg", "cityscapes-2.jpg", "cityscapes-3.jpg", "cityscapes-4.jpg", "cityscapes-5.jpg"],
+                    examples=["cityscapes-1.png", "cityscapes-2.png", "cityscapes-3.png", "cityscapes-4.png", "cityscapes-5.png"],
                     allow_flagging='never')