Update app.py

app.py

@@ -4,7 +4,7 @@ import os
 import tempfile
 from langchain_openai import ChatOpenAI, OpenAIEmbeddings
 from langchain_community.vectorstores import FAISS
-from langchain.text_splitter import RecursiveCharacterTextSplitter
+from langchain_text_splitters import RecursiveCharacterTextSplitter  # Fixed import
 from langchain_core.prompts import PromptTemplate
 from langchain_core.runnables import RunnablePassthrough
 from langchain_core.output_parsers import StrOutputParser