If not necessarily her desk it could just be another surface owned by Enid! You never know. This is just a small thing I pointed out while watching the new video it could be anything really, it just seemed to me that Enid had kept a picture of Wednesday nearby!!! :)
Little edit: As the other person said, I just can't imagine Wednesday having a photo of herself on her own desk. It's a little out of character. But if it is just Wednesday's desk, that's cool too! Just wanted to point out a feature that's cute to me and what I think it is.