fix: use absolute URL for Export Tags menu item (#1432)

use absolute URL for Export Tags menu item so that the menu item works no matter where in the course it's used. Fix this issue: https://github.com/openedx/frontend-app-authoring/issues/1380

src/header/hooks.js

@@ -90,7 +90,7 @@ export const useToolsMenuItems = courseId => {
     },
     ...(getConfig().ENABLE_TAGGING_TAXONOMY_PAGES === 'true'
       ? [{
-        href: '#export-tags',
+        href: `${studioBaseUrl}/course/${courseId}#export-tags`,
         title: intl.formatMessage(messages['header.links.exportTags']),
       }] : []
     ),