Update app.py

app.py

@@ -321,7 +321,7 @@ with gr.Blocks(css=css, js=js) as demo:
         cache_examples=False
     )
     predict_button.click(
-        fn=tagger.predict_on_gpu, # Call class method
+        tagger.predict_on_gpu, # Call class method
         inputs=[image_input, gen_threshold, char_threshold, output_mode],
         outputs=[output_tags, output_visualization]
     )