fix: update example app and dependencies

Author: dcoa

example/index.scss

@@ -1 +1,4 @@
+@use "@openedx/paragon/dist/core.min.css" as paragonCore;
+@use "@openedx/paragon/dist/light.min.css" as paragonLight;
+
 @import "@edx/frontend-component-header/index";