Update app.py

app.py

@@ -7,7 +7,7 @@ import pinecone
 from langchain.document_loaders import PyPDFDirectoryLoader
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.embeddings.openai import OpenAIEmbeddings
-from langchain.vectorstores import PineconeVectorStore
+from langchain_pinecone import PineconeVectorStore
 from langchain.prompts import PromptTemplate
 from langchain.chains.question_answering import load_qa_chain
 from ctransformers import CTransformers