fix: darkmode scroll bars (#480)

quartz/components/styles/darkmode.scss

@@ -21,6 +21,14 @@
   }
 }
 
+:root[saved-theme="dark"] {
+  color-scheme: dark;
+}
+
+:root[saved-theme="light"] {
+  color-scheme: light;
+}
+
 :root[saved-theme="dark"] .toggle ~ label {
   & > #dayIcon {
     opacity: 0;