Members of the U.S. Coast Guard rescued two people Friday night after their sailboat grounded and overturned near Little Egg Inlet, the maritime border that separates southern Ocean County and northeastern Atlantic County, officials said Saturday. One person aboard the 33-foot sailboat “Free Bird” used a marine radio around 8 p.m. on Friday to call the Coast Guard, reporting they grounded in shoals and started heeling over while heading south toward Atlantic City. A helicopter crew from the Coast Guard’s Atlantic City air station and rescue boat crews responded to the scene and located both pe…