changing thumbnail url

app.py

@@ -14,7 +14,7 @@ label = gr.Label()
 examples = ['Beijing_hot_pot.jpg', 'chinese_hot_pot.jpg', 'Korean_hot_pot.jpg']
 title = "Hot Pot Classifier " + "\N{face savoring food}" + "-- Chinese or Korean?"
 description = "Build with <3 by your biggest hot pot fan!"
-thumbnail = “https://w7.pngwing.com/pngs/151/297/png-transparent-fondue-yo-hot-pot-menu-cooking-pot-food-orange-cooking-thumbnail.png”
+thumbnail = 'https:w7.pngwing.com/pngs/151/297/png-transparent-fondue-yo-hot-pot-menu-cooking-pot-food-orange-cooking-thumbnail.png'
 
 
 demo = gr.Interface(fn=classify_image, inputs=image, outputs=label, examples=examples, allow_flagging = "never", title=title, description=description, thumbnail=thumbnail)