Update app.py

app.py

@@ -139,6 +139,6 @@ gr.Interface(
     ["./elephants.png", "an elephant; an elephant walking in the river; four elephants walking in the river"], 
     ["./apple_with_ipod.jpg", "an ipod; an apple with a write note 'ipod'; an apple"], 
     ["./crowd2.jpg", "a street; a street with a woman walking in the middle; a street with a man walking in the  middle"],
-    ["./zebras.jpg", "three zebras on the grass; two zebras on the grass; one zebra on the grass; no zebra on the grass; four zebras on the grass"], 
+    ["./zebras.png", "three zebras on the grass; two zebras on the grass; one zebra on the grass; no zebra on the grass; four zebras on the grass"], 
     ],
 ).launch()