Improving code organization

Author: mohammadzainabbas

README.md

@@ -215,7 +215,7 @@ conda activate reinforcement_learning
 
 3. Run the code
 
-[`train_ppo.py`](https://github.com/mohammadzainabbas/Reinforcement-Learning-CS/blob/main/src/train_ppo.py) - train the agent using `PPO` algorithm:
+[`train_ppo.py`](https://github.com/mohammadzainabbas/Reinforcement-Learning-CS/blob/main/src/train_ppo.py) - train the reinforcement learning agent using `PPO` algorithm:
 
 ```bash
 python src/train_ppo.py