fix: adjust spacing in homepage section elements

Author: fpichardom

ckanext/digitizationknowledge_theme/templates/home/index.html

@@ -32,8 +32,8 @@
     <div class="main module-feeds">
       <div class="container">
         <div class="row">
-          <div class="section-header">
-            <div class="section-header__headline-wrap">
+          <div class="section-header mb-2">
+            <div class="section-header__headline-wrap mb-4">
             <h2 class="section-header__headline">Featured Content – Organizations and Groups</h2>
             </div>
           </div>