Fixed seed-contents for react componentDidMount challenge (#40441)

curriculum/challenges/english/03-front-end-libraries/react/use-the-lifecycle-method-componentdidmount.md

@@ -91,7 +91,7 @@ class MyComponent extends React.Component {
       <div>
         {/* Change code below this line */}
         <h1>Active Users: </h1>
-        {/* Change code below this line */}
+        {/* Change code above this line */}
       </div>
     );
   }