ChainedScheduler documentation typoo

[AngledLuffa]

📚 The doc issue

Chains list of learning rate schedulers. It takes a list of chainable learning rate schedulers and performs consecutive step() functions **belong** to them by just one call.

Suggest a potential alternative/fix

Chains list of learning rate schedulers. It takes a list of chainable learning rate schedulers and performs consecutive step() functions belonging to them by just one call.

[AngledLuffa]

https://pytorch.org/docs/stable/generated/torch.optim.lr_scheduler.ChainedScheduler.html#torch.optim.lr_scheduler.ChainedScheduler