add some explanation

app.py

@@ -281,6 +281,8 @@ def main():
     st.sidebar.text("3. Set the score threshold \n   for prediction (default is 0.5)")
     st.sidebar.text("4. Set the scale for the XML file \n  (default is 1.0)")
     st.sidebar.text("5. Click on 'Launch Prediction'")
+    st.sidebar.text("6. You can now see the annotation \n   and the BPMN XML result")
+    st.sidebar.text("7. You can modify and download \n   the result in right format")
 
     st.sidebar.subheader("You can close this sidebar")