Update to jQuery UI 1.14.0

Closes #3483054

assets/vendor/jquery.ui/themes/base/accordion.css

 /*!
- * jQuery UI Accordion 1.13.2
- * http://jqueryui.com
+ * jQuery UI Accordion 1.14.1
+ * https://jqueryui.com
  *
- * Copyright jQuery Foundation and other contributors
+ * Copyright OpenJS Foundation and other contributors
  * Released under the MIT license.
- * http://jquery.org/license
+ * https://jquery.org/license
  *
- * http://api.jqueryui.com/accordion/#theming
+ * https://api.jqueryui.com/accordion/#theming
  */
 .ui-accordion .ui-accordion-header {
 	display: block;