Update README.md

README.md

@@ -23,5 +23,5 @@ model-index:
 
   # **Reinforce** Agent playing **CartPole-v1**
   This is a trained model of a **Reinforce** agent playing **CartPole-v1** .
-  To learn to use this model and train yours check Unit 4 of the Deep Reinforcement Learning Course: https://huggingface.co/deep-rl-course/unit4/introduction
+  Unit 4