using summary, not h2

app.js

@@ -27,7 +27,7 @@ const deleteItem = (event)=>{
 const updateItem = (event)=>{
 	event.preventDefault()
 	const newValue = event.target.parentNode.querySelector('input').value
-	event.target.parentNode.querySelector('h2').innerHTML = newValue
+	event.target.parentNode.querySelector('summary').innerHTML = newValue
 }
 
 const createNewItem = (event)=>{