Update app.py

app.py

@@ -1,7 +1,7 @@
 import gradio as gr
 
 # ✅ Use langchain_community imports
-from langchain_community.text_splitter import CharacterTextSplitter
+from langchain.text_splitter import CharacterTextSplitter
 from langchain_community.embeddings import HuggingFaceEmbeddings
 from langchain_community.vectorstores import FAISS
 from langchain_community.chains import ConversationalRetrievalChain