Fix spacing between statistics and discord widget on index page

Author: shakedown-street

punkweb_bb/templates/punkweb_bb/index.html

@@ -174,7 +174,7 @@
           </div>
         </div>
       </div>
-      <div class="pw-card fluid">
+      <div class="pw-card fluid mb-4">
         <div class="pw-card-header">Statistics</div>
         <div class="pw-card-content">
           <div class="index__statistics">