Update contact-input.html

Author: david-evans84-NHSD

app/views/david/contact-input.html

@@ -29,7 +29,8 @@ <h1>
         </ul> 
       </p>
 
-<div class="govuk-inset-text">
+      <div class="nhsuk-inset-text">
+  <span class="nhsuk-u-visually-hidden">Information: </span>
   <p>Your contact details will not be used for marketing or shared with anyone outside your GP surgery or the NHS.</p>
 </div>