adding cta

Signed-off-by: Kieran Fraser <Kieran.Fraser@ibm.com>

app.py

@@ -346,7 +346,10 @@ with gr.Blocks(css=css, theme='Tshackelton/IBMPlex-DenseReadable') as demo:
     eval_btn_patch.click(clf_poison_evaluate, inputs=[attack, trigger_image, target_class],
                 outputs=[clean_gallery, poison_gallery, clean_accuracy, poison_success])  
         
-    
+    gr.Markdown('''<br/>''')
+    gr.Markdown('''<p style="font-size: 18px; text-align: center;"><i>☠️ Want to try out a poisoning attack with your own model and data?
+                Run our <a href="https://github.com/Trusted-AI/adversarial-robustness-toolbox/blob/main/notebooks/hugging_face_poisoning.ipynb" 
+                    target="_blank">notebooks</a>!</i></p>''')
     gr.Markdown('''<br/>''')
             
 if __name__ == "__main__":