Merge pull request #27058 from overleaf/mf-re-add-sticky-header-plans-page

[web] Re-add sticky header for mobile plans table on bs5 version of the plans page

GitOrigin-RevId: 2c97e9983f8d0e1beb312c135558758a7f4f2ec0

services/web/frontend/stylesheets/bootstrap-5/pages/plans.scss

@@ -23,6 +23,7 @@ $z-index-group-member-picker-list: 1;
   --border-radius-large-new: 16px; // TODO: put this variable in a decent location
 
   padding-top: $header-height;
+  overflow: unset;
 
   .container {
     padding: 0 var(--spacing-06);