diffusers

3706aa33 - Add rescale_betas_zero_snr Argument to DDPMScheduler (#6305)

Add rescale_betas_zero_snr Argument to DDPMScheduler (#6305) * Add rescale_betas_zero_snr argument to DDPMScheduler. * Propagate rescale_betas_zero_snr changes to DDPMParallelScheduler. --------- Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>