[docs] fix embed issues (#14268)

erpnext/docs/user/manual/en/education/index.md

@@ -32,7 +32,7 @@ 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
 

erpnext/docs/user/manual/en/healthcare/index.md

@@ -19,7 +19,7 @@ The healthcare domain of ERPNext is a first domain to be competely contributed b
         <iframe src='https://www.youtube.com/embed/1n4_YqX8ArA' frameborder='0' allowfullscreen>
         </iframe>
     </div>
-<div>
+</div>
 
 ### User Manual
 

erpnext/docs/user/manual/en/non_profit/index.md

@@ -21,7 +21,7 @@ Check the following video to educate yourself on each feature in the non-profit
         <iframe src='https://www.youtube.com/embed/p3l0Kq-TU5Y' frameborder='0' allowfullscreen>
         </iframe>
     </div>
-<div>
+</div>
 
 ### User Manual
 

erpnext/docs/user/manual/en/setting-up/setting-up-taxes.md

@@ -102,7 +102,7 @@ add value to the item) or for both.
   <div class="embed-container">
     <iframe src="https://www.youtube.com/embed/a8Eh4zLIrkU?rel=0" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen>
     </iframe>
-  <div> 
+  </div>
 </div>
 
 {next}