fix doorstatus not updating every minute

roomstate.js incorrectly used setTimeout() instead of setInterval() to
call the door status. This caused the status to only be updated once
after the initial page load, instead of once every minute

themes/ccchh/assets/js/roomstate.js

@@ -76,5 +76,5 @@ function update() {
 
 window.onload = function () {
   update()
-  window.setTimeout(update, interval_ms)
+  window.setInterval(update, interval_ms)
 }