Update details role=dialog example

Author: snuggs

styles/index.html

@@ -2258,6 +2258,9 @@ <h6>Heading 6</h6>
         <summary>Details <var>role=dialog</var></summary>
 
         This is a <var>role=dialog</var> in a <code>&lt;details&gt;</code> element.
+        <footer>
+          <a data-icon=❌ title='Close' href=#dialog>Close</a>
+        </footer>
       </details>
 
       <footer><a title='Top of page' href=#>Top</a></footer>