UPDATE: While we earlier heard it was all day, Papa John’s employees are saying the deal ended at 4 p.m. Sorry! But at least there’s a closer pizza joint for those folks in Shaw, downtown, and Mt. Vernon Triangle. What’s better than hot pizza on a hot, hot day? Well, maybe it’s ice cream or water ice, but hey, the pizza is free! A new Papa John’s location near 4th and Mass NW just opened,…