Update app.py

app.py

@@ -15,7 +15,7 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 class BasicAgent:
     def __init__(self):
         print("BasicAgent initialized.")
-        self.graph = build_graph('huggingface')
+        self.graph = build_graph()
     def __call__(self, question: str) -> str:
         print(f"Agent received question (first 50 chars): {question[:50]}...")
         # Wrap the question in a HumanMessage from langchain_core