Update prompts.py

prompts.py

@@ -2,7 +2,7 @@ import time
 import gradio as gr
 from langchain.prompts import PromptTemplate
 from langchain.chains import RetrievalQA
-from langchain.embeddings import HuggingFaceEmbeddings
+from langchain_community.llms import HuggingFaceHub
 from langchain.vectorstores import FAISS
 from langchain.memory import ConversationBufferMemory
 from langchain.llms import HuggingFaceHub