Also spec serifs as Comic Sans

Author: aaronshekey

lib/css/exports/_stacks-constants-type.less

@@ -38,6 +38,7 @@ body {
 
 body.theme-dyslexic {
     --ff-sans: @ff-dyslexic, @ff-sans;
+    --ff-serif: @ff-dyslexic, @ff-sans;
     --ff-mono: Comic Mono;
 }