fix(stable_audio): align batched initial audio with prompts (#13629)#13659

Anai-Guo wants to merge 1 commit intohuggingface:mainhuggingface/diffusers:mainfrom

Anai-Guo:fix-stable-audio-prompt-alignmentAnai-Guo/diffusers:fix-stable-audio-prompt-alignmentCopy head branch name to clipboard