Turn off scroll anchoring for accordions (#31346)

New default behavior for scroll anchoring (rolled out in Chrome 84?) leads to unsightly/odd accordion interactions - see #31341
This rule suppresses this new behavior and reverts back to the old way.

See https://drafts.csswg.org/css-scroll-anchoring/

scss/_card.scss

@@ -220,6 +220,8 @@
 //
 
 .accordion {
+  overflow-anchor: none;
+
   > .card {
     overflow: hidden;