Improve model card for `push_to_hub` trainers (#8697)
* Improve trainer model cards
* Update train_dreambooth_sd3.py
* Update train_dreambooth_lora_sd3.py
* add link to adapters loading doc
* Update train_dreambooth_lora_sd3.py
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Co-authored-by: Linoy Tsaban <57615435+linoytsaban@users.noreply.github.com>
