fix nav submenu autoscroll (#768)

fix #759

Author: Rich-Harris

packages/site-kit/src/lib/nav/MobileSubMenu.svelte

@@ -12,7 +12,7 @@
 	});
 
 	export async function scrollToActive() {
-		const active = nav.querySelector('[aria-current="true"]') as HTMLElement;
+		const active = nav.querySelector('[aria-current="page"]') as HTMLElement;
 
 		if (!active) {
 			nav.scrollTop = 0;