Update app.py

app.py

@@ -123,7 +123,7 @@ def sepia(input_img):
 demo = gr.Interface(fn=sepia,
                     inputs=gr.Image(),
                     outputs=['plot'],
-                    examples=["sidewalk-1.jpg", "sidewalk-2.jpg", "sidewalk-3.jpg"],
+                    examples=["sidewalk-1.jpg", "sidewalk-2.jpg", "sidewalk-3.jpg","sidewalk-4.jpg"],
                     allow_flagging='never')