Update app.py

Author: lukasmasuch

issues/gh-14249/app.py

@@ -13,6 +13,8 @@ def foo():
 if section == "S1":
     st.markdown("- S1.1")
     st.markdown("- S1.2")
+    st.markdown("- S1.3")
+    st.markdown("- S1.4")
 elif section == "S2":
     (tab,) = st.tabs(["S2.Tab"])
     foo()