modify run to invoke

app.py

@@ -67,10 +67,11 @@ def get_response_from_model(prompt):
             return "QA chain is not initialized."
 
         docs = st.session_state.knowledge_base.similarity_search(prompt)
-        print("docs:", docs)
-        response = st.session_state.qa_chain.run(input_documents=docs, question=prompt)
-        print("response2:", response)
-
+        print("docs:", docs) # 이까진 됐는데
+        # Chain의 invoke() 메소드 사용
+        response = st.session_state.qa_chain.invoke(input_documents=docs, question=prompt)
+        print("response:", response)
+        
         if "Helpful Answer:" in response:
             response = response.split("Helpful Answer:")[1].strip()