* fix typos in idefics.md
Two typos found in reviewing this documentation.
1) max_new_tokens=4, is not sufficient to generate "Vegetables" as indicated - you will get only "Veget". (incidentally - some mention of how to select this value might be useful as it seems to change in each example)
2) inputs = processor(prompts, return_tensors="pt").to(device) as inputs need to be on the same device (as they are in all other examples on the page)
* Update idefics.md
Change device to cuda explicitly to match other examples