Update app.py

app.py

@@ -37,7 +37,7 @@ with gr.Blocks() as demo:
       chatbot = gr.Chatbot()
       msg =  gr.Textbox(interactive=True, )
       with gr.Row():
-        clear = gr.ClearButton([msg, chatbot], icon="")
+        clear = gr.ClearButton([msg, chatbot], icon="🧹")
         send_btn = gr.Button("Send 📨", variant='primary')
       msg.submit(fn=chat_mem, inputs=[msg, chatbot], outputs=[msg, chatbot])
       send_btn.click(fn=chat_mem, inputs=[msg, chatbot], outputs=[msg, chatbot])