Update app.py

app.py

@@ -2,7 +2,7 @@
 from langchain.document_loaders import PyPDFLoader
 from langchain.text_splitter import CharacterTextSplitter
 from langchain.embeddings import SentenceTransformerEmbeddings
-from langchain_huggingface import HuggingFaceEmbeddings
+from langchain_community.embeddings import HuggingFaceEmbeddings
 from langchain.vectorstores import FAISS
 from langchain.chains import RetrievalQA
 from langchain.llms import HuggingFacePipeline