Update app.py

app.py

@@ -2,7 +2,7 @@ import gradio as gr
 from huggingface_hub import InferenceClient
 from langchain_community.embeddings import HuggingFaceEmbeddings
 from langchain_community.vectorstores import FAISS
-from langchain_community.text_splitter import CharacterTextSplitter
+from langchain.text_splitter import CharacterTextSplitter
 from langchain_community.document_loaders import PyPDFLoader
 import os