fix: Fix storybook (no-changelog) (#4624)

since we migrated to vite, storybook/webpack aren't doing all the babel transforms. that's we we need to revert all optional-chaining and nullish-coalescing in design-system.

Hopefully this will be remedied after we move to vite for storybook.

packages/design-system/src/components/N8nMenu/Menu.vue

@@ -104,7 +104,7 @@ export default Vue.extend({
 			const found = this.items.find((item) => {
 				return (
 					(Array.isArray(item.activateOnRouteNames) &&
-						item.activateOnRouteNames.includes(this.$route.name ?? '')) ||
+						item.activateOnRouteNames.includes(this.$route.name || '')) ||
 					(Array.isArray(item.activateOnRoutePaths) &&
 						item.activateOnRoutePaths.includes(this.$route.path))
 				);