fix article page header link

shared/templates/styleguide2/includes/organisms/header/elections/article_header.html

 {% extends 'styleguide2/includes/organisms/header/elections/simple_header_with_tags_and_navigation.html' %}
 
 {% block before_heading %}
-  {% include 'styleguide2/includes/atoms/header/elections/navigation.html' with classes='mb-6' first_text=first_nav_text second_text=second_nav_text second_link=second_link %}
+  {% include 'styleguide2/includes/atoms/header/elections/navigation.html' with classes='mb-6' first_text=first_nav_text first_link=first_nav_link second_text=second_nav_text second_link=None %}
 {% endblock %}
 
 {% block heading_classes %}!text-black head-8xl{% endblock %}