Fix prettier complaints

_includes/header.liquid

@@ -105,7 +105,7 @@
                   {%- elsif p.permalink contains '/blog/' -%}
                     {%- assign url = '/blog/' -%}
                   {%- else -%}
-                    {%- assign url = p['url'] -%}
+                    {%- assign url = p.url -%}
                   {%- endif %}
                   <a class="nav-link" href="{{ url | relative_url }}">
                     {{- p.title }}