added pizza example to the gallery

examples.py

@@ -108,3 +108,7 @@ def app():
     st.markdown(
         "It seems it's half an armchair and half an avocado! We thank the DALL-E mini team for the great idea :)"
     )
+
+    st.subheader("A more classic example")
+    st.markdown("Is this a pizza, a dish of pasta or a cat?")
+    st.image("static/img/examples/pizza.png", use_column_width=True)