Update app.py

app.py

@@ -1,6 +1,6 @@
-from langchain_text_splitters import RecursiveCharacterTextSplitter
-from langchain_community.embeddings import HuggingFaceEmbeddings
-from langchain_community.vectorstores import FAISS
+from langchain.text_splitter import RecursiveCharacterTextSplitter
+from langchain.embeddings import HuggingFaceEmbeddings
+from langchain.vectorstores import FAISS
 from langchain.chains import ConversationalRetrievalChain
 from langchain.llms import HuggingFacePipeline
 from langchain.memory import ConversationBufferMemory