Update README.md

README.md

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 This is a trained model of a **PPO** agent playing **LunarLander-v2**
 using the [stable-baselines3 library](https://github.com/DLR-RM/stable-baselines3).
 Training time was less than 4 min on macbook m1 pro 
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 below is the base code which scored ~240, for the final submission, i re-trained the model 2-3 times to get slightly improved result
 
 ## Usage (with Stable-baselines3)