SB3 v1.6.1: Progress bar and custom yaml file

Breaking Changes

• Upgraded to Stable-Baselines3 (SB3) >= 1.6.1
• Upgraded to sb3-contrib >= 1.6.1

New Features

• Added --yaml-file argument option for train.pyto read hyperparameters from custom yaml files (@JohannesUl)

Bug fixes

• Added custom_object parameter on record_video.py (@Affonso-Gui)
• Changed optimize_memory_usage to False for DQN/QR-DQN on record_video.py (@Affonso-Gui)
• In ExperimentManager _maybe_normalize set training to False for eval envs,
  to prevent normalization stats from being updated in eval envs (e.g. in EvalCallback) (@pchalasani).
• Only one env is used to get the action space while optimizing hyperparameters and it is correctly closed (@SammyRamone)
• Added progress bar via the -P argument using tqdm and rich