Update src/streamlit_app.py

src/streamlit_app.py

@@ -174,6 +174,7 @@ def chatbot_page():
     if st.session_state.show_greeting:
         greeting = np.random.choice(welcome_messages)
         st.header(greeting)
+        st.session_state.show_greeting = False
     
     st.sidebar.title("💬 Chats")