contacts-8.x-1.x-dev/modules/user_dashboard/templates/user-dashboard-summary.html.twig

<div {{ attributes }}>
    <div {{ content_attributes }}>
        <h3>{{ title }}</h3>
        {{ content }}
        {% for key, button in buttons %}
            <a href="{{ button.link }}"{{ button.attributes|without('href') }}>{{ button.text }}</a>
        {% endfor %}
    </div>
</div>