Update vlog4chat.py

vlog4chat.py

@@ -30,7 +30,8 @@ from langchain_community.llms import HuggingFacePipeline
 #from langchain.embeddings import HuggingFaceEmbeddings
 from langchain_community.embeddings import HuggingFaceEmbeddings
 from langchain_community.document_loaders import TextLoader
-from langchain.document_loaders import UnstructuredFileLoader
+#from langchain.document_loaders import UnstructuredFileLoader
+from langchain_community.document_loaders import UnstructuredFileLoader
 from langchain_community.vectorstores import FAISS
 from langchain.utils import get_from_dict_or_env
 from langchain_core.runnables import RunnablePassthrough, RunnableParallel