Everyone exhale. Take a deep breath. Nikola Jokic was back in the lineup Monday after a four-game absence. Soon enough, the Nuggets’ six-game losing streak — Denver’s longest since 2015 — was over. Extinguished. Doused. Finished. Jokic had the Heat in his back pocket by halftime. Denver led Miami 63-43 at the break behind 17 points, 9 rebounds, and 2…