Fix hugo layout in hugo > ~0.130.0

For some reason, newer hugo versions have trouble with .summary, and on
some pages where .summary is not defined in the page header metadata,
when rendering the page as a preview card, hugo swallows the card's
closing </div> tag. Such a weird bug, we now just work around it by
explicitly setting the .summary meta on pages that cause this bug(?) to
surface.

themes/conspiracy/layouts/_partials/card.html

@@ -3,7 +3,7 @@
     {{- if and .Date (not (isset (index .Ancestors 0).Params "hide_date")) }}<strong>{{ .Date.Format "2006-01-02" }}</strong>{{- end }}
 
     <div class="summary">
-        {{ .Summary | safeHTML }}
+        {{ .Summary }}
         <a href="{{ .Permalink }}">Read more</a>
     </div>