Instagram / @brushedbyb_Halloween decorations are already out at CVS, pumpkin spice lattes are returning to Starbucks this week, and somehow, it’s already the end of August. Ready or not, fall is just around the corner. And while it may be way too hot to even think about throwing on a sweater, your manicure is an easy place to start getting into the seasonal spirit.You don’t have to completely abandon the colors you’ve been wearing all summer, e…