Update link course

app.py

@@ -181,7 +181,7 @@ def get_info_display(dataframe,env_name,name_leaderboard,is_empty):
         <br>    
         <p> You can click on the model's name to be redirected to its model card which includes documentation. </p>
         <br>
-        <p> You want to try your model? Read this <a href="https://github.com/huggingface/deep-rl-class/blob/Unit1/unit1/README.md" target="_blank">Unit 1</a> of Deep Reinforcement Learning Class.
+        <p> You want to try to train your agents? <a href="http://eepurl.com/h1pElX" target="_blank">Sign up to the Hugging Face free Deep Reinforcement Learning Class 🤗 </a>.
         </p>
         </div>
         """.format(len_dataframe = len(dataframe),env_name = env_name,name_leaderboard = name_leaderboard,num_unique_users = len(set(dataframe['User'].values)))