feat: add advert slot to download page

Change-Id: I9a1d0c87b2d82b41ea64bdd70339dcb90285c68e

content/en_index.php

diff --git a/content/en_index.php b/content/en_index.php
index 4582602..52a6d3b 100644
--- a/content/en_index.php
+++ b/content/en_index.php
@@ -53,7 +53,7 @@
   </div>
 </section>
 
-<section class="other-products-section container margin-bottom-40">
+<section class="other-products-section container">
   <div class="row">
 
     <div class="col-sm-10 col-sm-offset-1 col-md-6 col-md-offset-0 match-height-item-by-row">
@@ -121,6 +121,18 @@
   </div>
 </section>
 
+<!-- Ad Section -->
+<div class="row text-center margin-bottom-30">
+  <div class="container">
+    <div 
+      class="eclipsefdn-promo-content" 
+      data-ad-format="ads_top_leaderboard" 
+      data-ad-publish-to="eclipse_org_downloads"
+    >
+    </div>
+  </div>
+</div>
+
 <section class="featured-section-row featured-section-row-dark-bg text-center padding-top-60 padding-bottom-60" id="all-projects">
     <div class="container">
         <h2 id="projects">All Projects</h2>