Update app.py

app.py

@@ -234,7 +234,7 @@ demo = gr.Interface(
         gr.Dropdown(label="Dropdown", choices=CHOICES),
         gr.Image(label="Image"),
         gr.Image(label="Image w/ Cropper"),
-        gr.Image(label="Sketchpad", source="canvas"),
+        gr.Image(label="Sketchpad"),
         gr.Image(label="Webcam", source="webcam"),
         gr.Video(label="Video"),
         gr.Audio(label="Audio"),