fix: overflow when the gallery is inside other containers [skip ci]

Fix the fix in #2653

This is a simple fix, hopefully it will be fully resolved in the future.

layouts/shortcodes/gallery.html

@@ -25,8 +25,7 @@
   {{ end -}}
 {{ end -}}
 
-
-<div class="width-patch"></div>
+{{ if not .Parent }}<div class="width-patch"></div>{{ end }}
 <div id="{{- $id -}}" class="gallery">
   {{ $content | safeHTML -}}
 </div>