Add reference to Roberta Sentinel

app.py

@@ -6,6 +6,7 @@ import numpy as np
 # Add a title
 st.title('GPT Detection Demo')
 st.write("This is a demo for GPT detection. You can use this demo to test the model. The model is trained on two datasets: OpenGPT and CSAbstract. You can choose the model and dataset in the sidebar.")
+st.write("Reference on how we built Roberta Sentinel: https://arxiv.org/abs/2305.07969")
 
 # Add 4 options for 4 models
 ModelOption = st.sidebar.selectbox(