Support: non render-blocking fix to gohugoio/hugo#1778

The previous fix by @yihui requires JavaScript.  It's better to fix
this at the source generation level instead of the runtime level.
2 jobs for master in 1 minute and 18 seconds
Status Job ID Name Coverage
  Test
passed #100672957
pages

00:01:18

 
  Deploy
passed pages:deploy

00:00:08