Update app.py

app.py

@@ -154,7 +154,7 @@ 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"],
-    ["./donuts.png", "a bread; a donut; a number of donuts"],    
+    ["./donut.png", "a bread; a donut; a number of donuts"],    
     ],
     article=Path("docs/intro.md").read_text()    
 ).launch()