Update app.py

app.py

@@ -5,7 +5,7 @@ from langchain_community.document_loaders import PDFPlumberLoader
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain_core.vectorstores import InMemoryVectorStore
 from langchain_core.prompts import ChatPromptTemplate
-from langchain.embeddings import OpenAIEmbeddings
+from langchain.embeddings import HuggingFaceEmbeddings
 
 
 # Set up Hugging Face model and token