Error in make_multilingual.py example after update in AdamW implementation

[Lauler]

Hi,

This commit changing the AdamW implementation used from transformers to torch introduces an error in the example pretraining script make_multilingual.py.

In the transformers implementation there is an argument called correct_bias.

This argument doesn't exist in torch library's implementation: https://pytorch.org/docs/stable/generated/torch.optim.AdamW.html .

Can be fixed by just removing correct_bias from the dict passed to optimizer_params.
https://github.com/UKPLab/sentence-transformers/blob/master/examples/training/multilingual/make_multilingual.py#L220