[coati] add vf_coef argument for PPOTrainer#3318

ht-zhou merged 1 commit intohpcaitech:mainhpcaitech/ColossalAI:mainfrom

zhang-yi-chi:feature/vf_coef_for_ppo_trainerzhang-yi-chi/ColossalAI:feature/vf_coef_for_ppo_trainerCopy head branch name to clipboard