Update app.py

app.py

@@ -10,7 +10,7 @@ from langchain_core.output_parsers import StrOutputParser
 from langchain_core.runnables import RunnablePassthrough
 from langchain_openai import ChatOpenAI
 from langchain.agents import create_tool_calling_agent, AgentExecutor, Tool
-from langchain.vectorstores import FAISS
+from langchain_community.vectorstores import FAISS
 
 from langchain_openai import OpenAIEmbeddings
 from langchain.text_splitter import CharacterTextSplitter