transformers

99fc3ac8 - Modify efficient GPU training doc with now-available adamw_bnb_8bit optimizer (#25807)

Modify efficient GPU training doc with now-available adamw_bnb_8bit optimizer (#25807) * Modify single-GPU efficient training doc with now-available adamw_bnb_8bit optimizer * Apply suggestions from code review Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com> --------- Co-authored-by: Steven Liu <59462357+stevhliu@users.noreply.github.com>