_download.styl: Fix wrong indentation which resulted in wrong CSS.

Author: XhmikosR

layouts/css/page-modules/_download.styl

@@ -119,7 +119,7 @@ h5.download-table-previous-releases-header
     font-weight 600
 
   > tbody
-      td
+    td
       border-top 1px solid $light-gray2
 
     tr:nth-child(odd)