Update app.py

app.py

@@ -69,7 +69,7 @@ def main():
         st.session_state.chat_history = None
 
     st.header("Chat with your design book PDFs :books:")
-    user_question = st.text_input("Enter your question:")
+    user_question = st.chat_input("Enter your question:")
     if user_question:
         handle_userinput(user_question)