I want to add a `<span>some text</span>` after `<h2>`. The following `html` is from my content pages.

```
<section id="header-title" style="margin-bottom: 0;">
       <div class="container">
           <div class="row">
               <h2 style="text-align: left;">Create User</h2>
           </div>
      </div>
</section>

```

How to append `html tag` with javascript and jquery?