Add JetBrains Mono font link to index.html q

Added a new font link for JetBrains Mono.

Author: stopsopa

pages/css/index.html

@@ -586,6 +586,9 @@ <h2>Fonts</h2>
 
           https://fonts.google.com/specimen/Jost
             from: https://databasus.com/images/index/dashboard.svg
+
+          https://www.cdnfonts.com/jetbrains-mono.font
+          
         </script>
 
         <p>