fix: anchor sometimes failed to scroll (dotnet#9251)

* fix: anchor sometimes failed to scroll

* fix lint

* fix test

---------

Co-authored-by: Yufei Huang <yufeih@users.noreply.github.com>

Author: yufeih

templates/modern/src/markdown.ts

@@ -169,6 +169,11 @@ function renderAnchor() {
   }, window.docfx.anchors)
 
   anchors.add('article h2:not(.no-anchor), article h3:not(.no-anchor), article h4:not(.no-anchor)')
+
+  /* eslint-disable no-self-assign */
+  if (location.hash) {
+    location.href = location.href
+  }
 }
 
 /**