[HANDS-ON BUG] Unit 8 part 2, sample-factory 2.1.1 not compatible with pytorch 2.6+

# Describe the bug
Sample-factory utilizes a pytorch function:
`checkpoint_dict = torch.load(latest_checkpoint, map_location=device)`

Pytorch 2.6+ requires an additional `weights_only=False` variable for the function.

# Material

- [Google Colab](https://colab.research.google.com/github/huggingface/deep-rl-class/blob/main/notebooks/unit8/unit8_part2.ipynb#scrollTo=alxUt7Au-O8e)

# How to Fix

pip install the latest sample-factory:
`!pip install sample-factory==2.1.3`