Update app.py

Add huggingface_hub.InferenceClient to imports.

app.py

@@ -5,6 +5,7 @@ from requests import post
 
 import gradio as gr
 from transformers import AutoModelForCausalLM, AutoTokenizer
+from huggingface_hub import InferenceClient
 import spaces
 # from openai import OpenAI
 # import torch