{# heading added, include stays the same #}
<div class="cms-element-{{ element.type }}">
<div class="category-sidebar-box category-navigation-box">
<div class="category-sidebar-box__heading category-navigation-box__heading">{{ "general.categories"|trans|striptags }}</div>
{% sw_include '@Storefront/storefront/layout/sidebar/category-navigation.html.twig' with {
navigationTree: page.header.navigation.tree,
activeResult: page.header.navigation.active,
level: 2
} only %}
</div>
</div>