cleanrl/docs/benchmark/ppo.md

|                | openrlbenchmark/cleanrl/ppo ({'tag': ['pr-424']})   |
|:---------------|:----------------------------------------------------|
| CartPole-v1    | 490.04 ± 6.12                                       |
| Acrobot-v1     | -86.36 ± 1.32                                       |
| MountainCar-v0 | -200.00 ± 0.00                                      |