Update src/rag_engine.py

src/rag_engine.py

@@ -1,6 +1,6 @@
 import os
 from langchain_community.document_loaders import PyPDFLoader
-from langchain.text_splitter import RecursiveCharacterTextSplitter
+from langchain_text_splitters import RecursiveCharacterTextSplitter
 from langchain_openai import OpenAIEmbeddings, ChatOpenAI
 from langchain_community.vectorstores import FAISS
 from langchain_core.prompts import ChatPromptTemplate