fix depracated

serve/gradio_web_server.py

@@ -29,9 +29,9 @@ LOGDIR = "/home/user/app/logs"
 
 headers = {"User-Agent": "PrismaticVLMs Client"}
 
-no_change_btn = gr.Button.update()
-enable_btn = gr.Button.update(interactive=True)
-disable_btn = gr.Button.update(interactive=False)
+no_change_btn = gr.Button()
+enable_btn = gr.Button(interactive=True)
+disable_btn = gr.Button(interactive=False)
 
 
 def get_conv_log_filename():