[fix][education] close div tag in video embed

foundation/www/docs/user/manual/en/education/index.md

@@ -33,7 +33,7 @@ The very first implementation of ERPNext was driven by a school teacher herself.
         <iframe src='https://www.youtube.com/embed/t8ZDDq4qtIk?end=52' frameborder='0' allowfullscreen>
         </iframe>
     </div>
-<div>
+</div>
 
 ### User Manual
 
@@ -45,4 +45,4 @@ Education Institute needs lots more than Education module, and ERPNext has all o
 
 Here is the stepwise guide on each functionality of ERPNext Education module.
 
-{index}
+{index}