feat(elements): update pf-alert demo and test HTML files

Author: chubara62372

elements/pf-alert/demo/pf-alert.html

@@ -61,4 +61,4 @@ <h3 slot="header">Caution</h3>
   import '@patternfly/elements/pf-alert/pf-alert.js';
   import '@patternfly/elements/pf-button/pf-button.js';
 </script>
-// 
+//hi