Harry Potter is back — mysterious, married, and going gray. J.K. Rowling has given fans a glimpse of the grown-up boy wizard in a new story posted Tuesday on her Pottermore website. It’s the first update since “Harry Potter and the Deathly Hallows” was published in 2007, but Rowling spokesman Mark Hutchinson said there are “no plans” for a new Potter novel. The 1,500-word story describes Harry, about to turn 34, attending the final of the Quidditch World Cup with his family and old friends Ron and Hermione.