Add a missing bracket in the solution description

Author: PGlivicky

2-ui/1-document/07-modifying-document/10-clock-setinterval/solution.md

@@ -44,6 +44,7 @@ function clockStart() { // run the clock
     timerId = setInterval(update, 1000);
   }
   update(); // (*)
+}
 
 function clockStop() {
   clearInterval(timerId);