Sample solution for the challenge seed code (#31929)

* Sample solution for the challenge seed code

I have updated the sample solution for the challenge seed code.

* Update headline-with-the-h2-element.english.md

Removed //solution required


Co-authored-by: Paul Gamble <pgamble@gmail.com>

curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/headline-with-the-h2-element.english.md

@@ -51,9 +51,14 @@ tests:
 </section>
 
 ## Solution
+
 <section id='solution'>
   
-```js
+```html
-// solution required
+<h1>Hello World</h1>
+<h2>CatPhotoApp</h2>
 ```
+
 </section>  
+
+