fix dark mode for default theme

packages/app/src/components/Theme/ThemeDefault.global.scss

@@ -116,7 +116,7 @@
 
 //== Dark Mode
 //
-:root[data-theme='light'] .theme-dark {
+:root[data-theme='dark'] .theme-default {
   $primary: #115cd3;
   $accent: #db00c2;