Update app.py

app.py

@@ -310,7 +310,7 @@ with block:
     We use **lower bound result to sort the models: mean_reward - std_reward.**
 
     ### I can't find my model 😭
-    The leaderboard is **updated every hour** if you can't find your models, just wait for the next update.
+    The leaderboard is **updated every two hours** if you can't find your models, just wait for the next update.
     
     ### The Deep RL Course
     🤖 You want to try to train your agents? <a href="https://huggingface.co/deep-rl-course/unit0/introduction?fw=pt" target="_blank"> Check the Hugging Face free Deep Reinforcement Learning Course 🤗 </a>.