senat campaign: Fix footer styles

senat_campaign/templates/senat_campaign/base.html

@@ -168,7 +168,7 @@
         <div class="row">
 
           {% for contact in page.root_page.contacts %}
-          <div class="col-12 col-md-6 col-xl-4 mb-4 mb-xl-0">
+          <div class="col-12 col-md-6 col-xl-4 mb-4">
             <div class="person">
               <div class="person__photo">
                 <div class="person__photo-inner">