update dependency

app.py

@@ -9,8 +9,8 @@ from langchain.text_splitter import CharacterTextSplitter
 from langchain.chat_models import AzureChatOpenAI
 from langchain.document_loaders import DirectoryLoader
 from langchain.chains import RetrievalQA  
-from langchain.vectorstores import Pinecone
-# from langchain.vectorstores.pinecone import Pinecone
+# from langchain.vectorstores import Pinecone
+from langchain.vectorstores.pinecone import Pinecone
 from langchain.agents import initialize_agent
 from langchain.agents import AgentType
 from langchain.agents import Tool