fix: partial revert of 18cd69 (#9013)

Author: avivkeller

packages/ui-components/src/Containers/Article/index.module.css

@@ -17,8 +17,8 @@
 
   > *:nth-child(1) {
     @apply ml:sticky
-      ml:top-[var(--header-height)]
-      ml:h-[calc(100svh-var(--header-height))]
+      ml:top-0
+      ml:h-svh
       ml:overflow-y-auto
       [grid-area:sidebar];
   }