Update utils.py

utils.py

@@ -28,7 +28,7 @@ from pygments import highlight
 from pygments.lexers import guess_lexer,get_lexer_by_name
 from pygments.formatters import HtmlFormatter
 
-from langchain_community.chains import LLMChain, RetrievalQA
+from langchain.chains import LLMChain, RetrievalQA
 from langchain_community.document_loaders import PyPDFLoader,  UnstructuredWordDocumentLoader, DirectoryLoader
 #from langchain.document_loaders.blob_loaders.youtube_audio import YoutubeAudioLoader
 #from langchain.document_loaders import GenericLoader