Update app.py

Update little bit

app.py

@@ -287,6 +287,7 @@ with gr.Blocks() as app:
                 dropbox.upload(fn=upload_file, inputs=[dropbox],outputs=[audio_picker])
         audio_refresher = gr.Button("Refresh")
         audio_refresher.click(fn=refresh,inputs=[],outputs=[audio_picker,model_picker,index_picker])
+    with gr.Row():
         convert_button = gr.Button("Convert")
     with gr.Row():
         audio_player = gr.Audio()