chore: update the environment variable name

app.py

@@ -11,7 +11,7 @@ try:
     )
     tools = mcp_client.get_tools()
 
-    model = InferenceClientModel(token=os.getenv("HUGGINGFACE_API_TOKEN"))
+    model = InferenceClientModel(token=os.getenv("HF_TOKEN"))
     agent = CodeAgent(tools=[*tools], model=model, additional_authorized_imports=["json", "ast", "urllib", "base64"])
 
     demo = gr.ChatInterface(