fix: one of those notorious one character solves

src/pages/main/posts/post.html

@@ -7,7 +7,7 @@ pagination:
 permalink: "{{ post.slug }}/index.html"
 schema: blog
 ---
-{%- capture postUrl %}{{ meta.url }}{{ post.slug }}{% endcapture -%}
+{%- capture postUrl %}{{ meta.url }}{{ post.slug }}/{% endcapture -%}
 <article class="h-entry">
   <div class="flex-centered gap-xs icon-small icon-light">
     {% tablericon "calendar-month" "Date" %}