Update app.py

app.py

@@ -4,6 +4,7 @@ from streamlit_extras.colored_header import colored_header
 from streamlit_extras.add_vertical_space import add_vertical_space
 from langchain import PromptTemplate, HuggingFaceHub, LLMChain
 from dotenv import load_dotenv         #Loads environment variables
+pip install streamlit-chat
 
 # load the Environment Variables. 
 load_dotenv()