Update app.py

app.py

@@ -3,7 +3,7 @@ import time
 import numpy as np
 from langchain.document_loaders import PyPDFLoader
 from langchain.text_splitter import RecursiveCharacterTextSplitter
-from langchain.embeddings import TogetherEmbeddings
+from langchain_together import TogetherEmbeddings
 from langchain.chat_models import ChatOpenAI
 from sklearn.metrics.pairwise import cosine_similarity