fixed typo

app.py

@@ -91,7 +91,7 @@ class BasicAgent:
     def __call__(self, question: str) -> str:
         print(f"Agent received question (first 50 chars): {question[:50]}...")
         #fixed_answer = "This is a default answer."
-        fixed_answer = agent.run(questions)
+        fixed_answer = agent.run(question)
         print(f"Agent returning fixed answer: {fixed_answer}")
         return fixed_answer