Add preconnect to Google Fonts

Author: Vimux

layouts/_default/baseof.html

@@ -19,6 +19,7 @@
 
 	{{- $googleFontsLink := .Site.Params.googleFontsLink | default "https://fonts.googleapis.com/css?family=Open+Sans:400,400i,700" }}
 	{{- if hasPrefix $googleFontsLink "https://fonts.googleapis.com/" }}
+	<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
 	<link rel="dns-prefetch" href="//fonts.googleapis.com">
 	<link rel="dns-prefetch" href="//fonts.gstatic.com">
 	<link rel="stylesheet" {{ printf `href="%s"` $googleFontsLink | safeHTMLAttr }}>