Update app.py

app.py

@@ -1,7 +1,7 @@
 import os
 import gradio as gr
 from PyPDF2 import PdfReader
-from langchain.text_splitter import RecursiveCharacterTextSplitter
+from langchain_text_splitters import RecursiveCharacterTextSplitter
 from langchain_community.vectorstores import FAISS
 from langchain_community.embeddings import HuggingFaceEmbeddings
 from langchain.chains import RetrievalQA