Update app.py

app.py

@@ -1,5 +1,5 @@
-from langchain.document_loaders import UnstructuredURLLoader
-from langchain.document_loaders import (
+from langchain_community.document_loaders import UnstructuredURLLoader
+from langchain_community.document_loaders import (
     PyPDFLoader, TextLoader, Docx2txtLoader, UnstructuredHTMLLoader
 )
 from langchain.text_splitter import RecursiveCharacterTextSplitter
@@ -8,7 +8,7 @@ from langchain_google_genai import ChatGoogleGenerativeAI
 from langchain_google_genai import GoogleGenerativeAIEmbeddings
 from langchain_community.docstore.in_memory import InMemoryDocstore
 from langchain_community.vectorstores import FAISS
-from sentence_transformers import SentenceTransformer
+import fiass
 from dotenv import load_dotenv
 import pickle
 import os