Issue #3501191: Add noindex to nojs URLs

src/Plugin/TabRenderer/QuickTabs.php

@@ -214,6 +214,7 @@ class QuickTabs extends TabRendererBase implements ContainerFactoryPluginInterfa
                 'class' => $link_classes,
                 'data-quicktabs-tab-index' => $index,
                 'tabindex' => $default_tab == $index ? 0 : -1,
+                'rel' => 'noindex',
               ],
             ]
           )