Update app.py

app.py

@@ -7,6 +7,8 @@ from langchain_huggingface import HuggingFaceEndpoint, HuggingFaceEmbeddings  #
 from langchain_community.document_loaders import PyPDFLoader  # ✅ Fixed Import
 import time
 
+os.system("pip install -U huggingface_hub langchain_huggingface langchain_core langchain")
+
 # Define paths for cybersecurity training PDFs
 PDF_FILES = [
     "ISOIEC 27001_2ef522.pdf",