chore: update local jQuery UI to version 1.14.1 (#832)

* chore: update jQuery UI to version 1.14.1

Author: luisfelipec95

cms/templates/content_libraries/xblock_iframe.html

@@ -16,7 +16,7 @@
     $.ajaxWithPrefix = $.ajax;
   </script>
   <!-- The Video XBlock requires "Slider" from jQuery-UI: -->
-  <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js"></script>
+  <script src="https://code.jquery.com/ui/1.14.1/jquery-ui.min.js"></script>
   <!-- The video XBlock depends on Underscore.JS -->
   <script type="text/javascript" src="{{ lms_root_url }}/static/common/js/vendor/underscore.js"></script>
   <!-- The video XBlock depends on jquery-cookie -->