_includes/head.html: preload OpenSans font to prevent redraws

Signed-off-by: Sebastiaan van Stijn <[email protected]>

Author: thaJeztah

_includes/head.html

@@ -74,6 +74,7 @@
   we only preload the "woff2" variants, as older formats (woff, eot) are only used
   by older browsers, and we don't optimize for those.
   {%- endcomment -%}
+  <link rel="preload" as="font" href="https://fonts.gstatic.com/s/opensans/v18/mem8YaGs126MiZpBA-UFVZ0bf8pkAg.woff2" type="font/woff2" crossorigin="anonymous">
   <link rel="preload" as="font" href="/fonts/geomanist/hinted-Geomanist-Book.woff2"    type="font/woff2" crossorigin="anonymous">
   <link rel="preload" as="font" href="/fonts/geomanist/hinted-Geomanist-Regular.woff2" type="font/woff2" crossorigin="anonymous">
   <link rel="preload" as="font" href="/fonts/glyphicons-halflings-regular.woff2"       type="font/woff2" crossorigin="anonymous">