[docs] added missing default value (#4267)

docs/Training-Configuration-File.md

@@ -58,7 +58,7 @@ the `trainer` setting above).
 | `hyperparameters -> beta`      | (default = `5.0e-3`) Strength of the entropy regularization, which makes the policy "more random." This ensures that agents properly explore the action space during training. Increasing this will ensure more random actions are taken. This should be adjusted such that the entropy (measurable from TensorBoard) slowly decreases alongside increases in reward. If entropy drops too quickly, increase beta. If entropy drops too slowly, decrease `beta`. <br><br>Typical range: `1e-4` - `1e-2`                                                                                                                                                                     |
 | `hyperparameters -> epsilon`   | (default = `0.2`) Influences how rapidly the policy can evolve during training. Corresponds to the acceptable threshold of divergence between the old and new policies during gradient descent updating. Setting this value small will result in more stable updates, but will also slow the training process. <br><br>Typical range: `0.1` - `0.3`                                                                                                                                                                                                                                                                                                                      |
 | `hyperparameters -> lambd`     | (default = `0.95`) Regularization parameter (lambda) used when calculating the Generalized Advantage Estimate ([GAE](https://arxiv.org/abs/1506.02438)). This can be thought of as how much the agent relies on its current value estimate when calculating an updated value estimate. Low values correspond to relying more on the current value estimate (which can be high bias), and high values correspond to relying more on the actual rewards received in the environment (which can be high variance). The parameter provides a trade-off between the two, and the right value can lead to a more stable training process. <br><br>Typical range: `0.9` - `0.95` |
-| `hyperparameters -> num_epoch` | Number of passes to make through the experience buffer when performing gradient descent optimization.The larger the batch_size, the larger it is acceptable to make this. Decreasing this will ensure more stable updates, at the cost of slower learning. <br><br>Typical range: `3` - `10`                                                                                                                                                                                                                                                                                                                                                           |
+| `hyperparameters -> num_epoch` | (default = `3`) Number of passes to make through the experience buffer when performing gradient descent optimization.The larger the batch_size, the larger it is acceptable to make this. Decreasing this will ensure more stable updates, at the cost of slower learning. <br><br>Typical range: `3` - `10`                                                                                                                                                                                                                                                                                                                                                           |
 
 ### SAC-specific Configurations