Actress Bridget Moynahan knew exactly where she should have dinner when she had free time in town Wednesday night. The Longmeadow native, who’s been in Boston supporting the national early education program Jumpstart, said she and her friends took a boat to Hingham so that she could check out her “Blue Bloods’’ costar Donnie Wahlberg’s burger joint, Wahlburgers. Moynahan said the place looked great but that she wound up eating across the street at Donnie’s brother Paul Wahlberg’s restaurant Alma Nove, which is named for matriarch Alma Wahlberg and her nine children. At least she kept it in the family.