pelican-theme-bootstrap4/templates/includes/taglist.html

{% if article.tags %}
<span class="label label-default">&nbsp;|&nbsp;{{ _('Tags') }}:&nbsp;</span>
{% for tag in article.tags %}
	<a href="{{ SITEURL }}/{{ tag.url }}">{{ tag }}</a>
    {% if not loop.last %}
        /
    {% endif %}
{% endfor %}
{% endif %}