matugen: make UI font and monospace font different variables

stow/.config/matugen/templates/discord.css

@@ -18,6 +18,7 @@
 :root {
 	/* font, change to 'gg sans' for default discord font*/
 	--font: '{{ font }}';
+  --code-font: '{{ monospace_font }}';
 
 	/* top left corner text */
 	--corner-text: 'Midnight';
@@ -91,6 +92,10 @@ body {
   font-family: '{{ font }}';
 }
 
+code {
+  font-family: '{{monospace_font}}';
+}
+
 /* Selected chat/friend text */
 .selected_f5eb4b,
 .selected_f6f816 .link_d8bfb3 {