Reduce comments font size for events feed

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/assets/stylesheets/sections/events.scss

@@ -63,6 +63,10 @@
       color: #666;
       margin-top: 5px;
 
+      .md {
+        font-size: 13px;
+      }
+
       pre {
         border: none;
         background: #f9f9f9;