docs: Add scheme to link to fonts.googleapis.com (#910)

This makes it possible to view generated HTML files locally using the file scheme.

diff --git a/doc/ccache-doc.css b/doc/ccache-doc.css
index ccd183e6df5dceec83c60e782e430a07a6a11289..86a0ed908eabe25ccd19602e91121769ad81be1e 100644 (file)
--- a/doc/ccache-doc.css
+++ b/doc/ccache-doc.css
@@ -1,4 +1,4 @@
-@import url(//fonts.googleapis.com/css?family=Montserrat|Open+Sans);
+@import url(https://fonts.googleapis.com/css?family=Montserrat|Open+Sans);
 @import url(https://cdn.jsdelivr.net/gh/asciidoctor/asciidoctor@2.0/data/stylesheets/asciidoctor-default.css); /* Default asciidoc style framework - important */
 
 :root{