replace py-3 px-4 from alert-unlinked

src/server/views/widget/page_alerts.html

@@ -61,6 +61,7 @@
     {% endif %}
 
     {% if req.query.unlinked %}
+    <div class="alert alert-info py-3 px-4">
       <strong>{{ t('Unlinked') }}: </strong> {{ t('page_page.notice.unlinked') }}
     </div>
     {% endif %}