fix: remove alt in decorative images

layouts/partials/article-link/card.html

@@ -60,7 +60,7 @@
     <div class="flex-none relative overflow-hidden thumbnail_card">
       <img
         src="{{ . }}"
-        alt="{{ $page.Title | plainify }}"
+        role="presentation"
         loading="lazy"
         decoding="async"
         class="not-prose absolute inset-0 w-full h-full object-cover">