[Docs] Update hunyuan_video.md to rectify the checkpoint id (#10524)
* Update hunyuan_video.md to rectify the checkpoint id
* bfloat16
* more fixes
* don't update the checkpoint ids.
* update
* t -> T
* Apply suggestions from code review
* fix
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Co-authored-by: YiYi Xu <yixu310@gmail.com>