Could say the same for the apostrophe. But you'd agree the apostrophe is grammatically correct, yes? You already have it there. The comma too is grammatically correct. This is not. Do what you want though. Nobody cares.
Discussion
Nobody cares?
Nobody else will care as much as you do. As a designer you already know that. If you don't care, anybody who buys this design isn't going to care either. However, you won't know about the potential customers who do care and just won't buy it or tell you so. Good luck.
Appreciate the feedback 🙏