fix(pat scroll-marker): The init method does not need to be async.

Author: thet

src/pat/scroll-marker/scroll-marker.js

@@ -31,7 +31,7 @@ class Pattern extends BasePattern {
     // differently, e.g. by clicking in a pat-navigation menu.
     set_current_disabled = false;
 
-    async init() {
+    init() {
         // Get all elements that are referenced by links in the current page.
         this.observables = new Map(
             [...dom.querySelectorAllAndMe(this.el, "a[href^='#']")]