Make company field mandatory

templates/contact-us.html

@@ -42,7 +42,7 @@ <h3 class="p-card__title">Looking for a little professional support?</h3>
             </li>
 
             <li>
-              <label for="company">Company:
+              <label for="company" class="is-required">Company:
               </label>
               <input required id="company" name="company" maxlength="255" type="text">
             </li>