increases refresh rate of timer

static/hackathon_countdown.html

@@ -191,7 +191,7 @@ <h1>Announcements</h1>
                     }
                 }
                 timer.textContent = text;
-            }, 1000);
+            }, 100);
 
             const announcements_option = document.getElementById("show-announcements");
             const announcements_element = document.getElementById("announcements");