Add UTC time to work clock

src/bin/work.rs

@@ -73,6 +73,8 @@ fn main() {
         },
     ]);
     bar.push(dt);
+    let dt_utc = DateTimeWidget::tz("UTC %H:%M", chrono::offset::Utc);
+    bar.push(dt_utc);
 
     // Then start updating the status bar
     bar.update_loop(I3Protocol::new(Header::new(1), std::io::stdout()));