I would spray the seed casing with some water to soften it up a bit. Hopefully that will help it push off its shell. After a few days and it hasn't come off I would either try to gently pull it off with tweezers or start another seed.
Carefully take a pair of tweezers and pry it open but not off or risk ripping the new leaves off. Just help it along and it will fall off in due time. 🤘😤