Attempt to fix broken breadcrumb links

Apparently this is a bug when canonifyURLs = true, which is a required option
to fix relative urls on spec pages.

layouts/partials/breadcrumb.html

@@ -23,6 +23,6 @@
 {{ end }}
 {{ $isActive :=  eq .p1 .p2  }}
 <li class="breadcrumb-item{{ if $isActive }} active{{ end }}" {{ if $isActive }}aria-current="page"{{ end }}>
-	<a href="{{ .p1.Permalink }}">{{ .p1.LinkTitle }}</a>
+	<a href="{{ .p1.RelPermalink }}">{{ .p1.LinkTitle }}</a>
 </li>
 {{ end }}