dev: fix website search for items with quotes

Author: ldez

docs/layouts/_partials/utils/extract-headings.html

@@ -21,7 +21,7 @@
   {{ end }}
 
   {{ $title := (printf "<h%d>%s" $heading.Level $heading.Title) }}
-  {{ $.scratch.Add "titles" (slice $title) }}
+  {{ $.scratch.Add "titles" (slice ($title | htmlUnescape)) }}
 
   {{ partial "utils/extract-headings.html" (dict
     "target" $heading