Update app.py

app.py

@@ -89,7 +89,7 @@ with gr.Blocks(css=custom_css) as demo:
             img2 = gr.Image("images/cheetah.jpg",label="Image Gnerated by Prompt of UnlearnDiffAtk",width=260,show_share_button=False,show_download_button=False)
             
 
-    start_button.click(fn=excute_udiff, inputs=[drop_model, drop, shown_columns_step], outputs=[text_ouput], api_name="udiff")
+        start_button.click(fn=excute_udiff, inputs=[drop_model, drop, shown_columns_step], outputs=[text_ouput], api_name="udiff")
 
 
 demo.queue().launch(server_name='0.0.0.0',share=True)