typo

app.py

@@ -1379,7 +1379,7 @@ with gradio.Blocks() as demo:
               true = gradio.Plot(label="True")
     
         btn1.click(fn=lambda: random.randint(1, 4999), inputs=[], outputs=num)
-        num.chnage(fn=performance, inputs=[num], outputs=[perf])
+        num.change(fn=performance, inputs=[num], outputs=[perf])
         btn2.click(fn=simple_synthesis, inputs=[num], outputs=[pred, true])
     
 demo.launch()