adds margin to the bottom of fb widget

Author: HarryEMartland

index.html

@@ -55,7 +55,7 @@ <h2>Watch this space</h2>
                     when the events are.
                 </p>
 
-                <div class="text-center">
+                <div class="text-center mb-4">
                     <div class="fb-page" data-href="https://www.facebook.com/codewithgroup" data-tabs="events" data-width="" data-height="" data-small-header="false" data-adapt-container-width="true" data-hide-cover="false" data-show-facepile="true"><blockquote cite="https://www.facebook.com/codewithgroup" class="fb-xfbml-parse-ignore"><a href="https://www.facebook.com/codewithgroup">CodeWith</a></blockquote></div>
                 </div>