Make breadcrumb navigation a number list

src/_includes/global/content.njk

@@ -2,14 +2,14 @@
     {% if isArticle or hasBreadcrumbs %}
         <nav>
             <h2 class="visually-hidden">Breadcrumbs</h2>
-            <ul class="breadcrumbs">
+            <ol class="breadcrumbs">
                 {% set breadcrumbNavPages = collections.all | eleventyNavigationBreadcrumb(articleTitle or pageTitle or title) %}
                 {%- for entry in breadcrumbNavPages %}
                 <li>
                     <a href="{{ entry.url }}">{{ entry.title }}</a>
                 </li>
                 {%- endfor %}
-            </ul>
+            </ol>
         </nav>
     {% endif %}