Update app.py

app.py

@@ -10,7 +10,7 @@ st.header("Chat with the Streamlit docs 💬 📚")
 
 if "messages" not in st.session_state.keys(): # Initialize the chat message history
     st.session_state.messages = [
-        {"role": "assistant", "content": "Ask me a question about Streamlit's open-source Python library!"}
+        {"role": "assistant", "content": "Ask me a question about the decision by the UK Supreme Court in McDonald v Kensington"}
     ]
 
 @st.cache_resource(show_spinner=False)