Update app.py

app.py

@@ -3,7 +3,7 @@ from PyPDF2 import PdfReader
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 import os
 from langchain_google_genai import GoogleGenerativeAIEmbeddings
-from lanchain.llms import HuggingFaceHub
+from langchain.llms import HuggingFaceHub
 from langchain.embeddings import HuggingFaceInferenceAPIEmbeddings
 import google.generativeai as genai
 from langchain.vectorstores import FAISS