Fix missing else for collection cards (#2692)

Author: ludoboludo

snippets/card-collection.liquid

@@ -80,6 +80,7 @@
         <div class="card__media">
           {{ placeholder_image | placeholder_svg_tag: 'placeholder-svg' }}
         </div>
+      {%- else -%}
         <div class="card__content">
           <div class="card__information">
             <h3 class="card__heading">