added layoutBackgroundBlur parameter to articles

layouts/partials/hero/background.html

@@ -12,6 +12,7 @@
         class="absolute inset-0 opacity-30 dark:opacity-60 bg-gradient-to-t from-neutral dark:from-neutral-800 to-neutral dark:to-neutral-800 mix-blend-normal">
     </div>
 </div>
+{{ if $.Site.Params.article.layoutBackgroundBlur | default false }}
 <div id="background-blur" class="fixed opacity-0 inset-x-0 top-0 h-full single_hero_background nozoom backdrop-blur-2xl"></div>
 <script>
     window.addEventListener('scroll', function (e) {
@@ -21,4 +22,5 @@
     });
 </script>
 {{ end }}
+{{ end }}
 {{- end -}}