Bug 4177 - Add April 2021 member newsletter to list

Signed-off-by: Eric Poirier <eric.poirier@eclipse-foundation.org>
diff --git a/newsletter/content/en_index.php b/newsletter/content/en_index.php
index 1e6043a..2541b6a 100644
--- a/newsletter/content/en_index.php
+++ b/newsletter/content/en_index.php
@@ -18,6 +18,7 @@
   <div class="col-md-6">
     <h3>2021</h3>
     <ul>
+      <li><a href="2021/april/" target="_blank">April 2021</a></li>
       <li><a href="2021/march/" target="_blank">March 2021</a></li>
       <li><a href="2021/february/" target="_blank">February 2021</a></li>
     	<li><a href="2021/january/" target="_blank">January 2021</a></li>