Remove site.url from first breadcrumb link (#3051)

* Remove site.url from first breadcrumb link

Fixes #3050

* Use relative_rul filter instead of site.baseurl

Author: erikw

_includes/breadcrumbs.html

@@ -19,7 +19,8 @@
     {% for crumb in crumbs offset: 1 %}
       {% if forloop.first %}
         <li itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem">
-          <a href="{{ site.url }}{{ site.baseurl }}/" itemprop="item"><span itemprop="name">{{ site.data.ui-text[site.locale].breadcrumb_home_label | default: "Home" }}</span></a>
+          <a href="{{ '/' | relative_url }}" itemprop="item"><span itemprop="name">{{ site.data.ui-text[site.locale].breadcrumb_home_label | default: "Home" }}</span></a>
+
           <meta itemprop="position" content="{{ i }}" />
         </li>
         <span class="sep">{{ site.data.ui-text[site.locale].breadcrumb_separator | default: "/" }}</span>