Update Gradio ChatInterface configuration in consuming_tgi.md (#3042)

The current code does not work and gives the following message:

    UserWarning: You have not specified a value for the `type` parameter. Defaulting to the 'tuples' format for chatbot messages, but this is deprecated and will be removed in a future version of Gradio. Please set type='messages' instead, which uses openai-style dictionaries with 'role' and 'content' keys.
      warnings.warn(
    Traceback (most recent call last):
      File "/Users/angt/hf/tgi/test-gradio.py", line 22, in <module>
        gr.ChatInterface(
    TypeError: ChatInterface.__init__() got an unexpected keyword argument 'retry_btn'

Signed-off-by: Adrien Gallouët <[email protected]>

Author: angt

docs/source/basic_tutorials/consuming_tgi.md

@@ -152,14 +152,10 @@ def inference(message, history):
 
 gr.ChatInterface(
     inference,
-    chatbot=gr.Chatbot(height=300),
-    textbox=gr.Textbox(placeholder="Chat with me!", container=False, scale=7),
+    type="messages",
     description="This is the demo for Gradio UI consuming TGI endpoint.",
     title="Gradio 🤝 TGI",
     examples=["Are tomatoes vegetables?"],
-    retry_btn="Retry",
-    undo_btn="Undo",
-    clear_btn="Clear",
 ).queue().launch()
 ```