Update app.py

app.py

@@ -2,7 +2,7 @@ from langchain_community.embeddings import HuggingFaceBgeEmbeddings
 from langchain_community.document_loaders import PyPDFLoader, DirectoryLoader
 from langchain_community.vectorstores import Chroma
 from langchain.chains import RetrievalQA
-from langchain_core.prompts import PromptTemplate
+from langchain.prompts import PromptTemplate
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain_groq import ChatGroq
 import os