ORLANDO, Fla. — Scottie Scheffler’s Sunday stroll at the Arnold Palmer Invitational ended a nearly year-long drought, secured his spot atop the world rankings and validated a recent putter change. Scheffler’s 5-shot victory also turned an event known for final-round fireworks into a dud. A closing 6-under-par 66 was the day’s low score — the only bogey-free round — and served notice entering …