Fix wrong border radius location on new plans page group and student table (#10874)

GitOrigin-RevId: 744b81b3e5a7b189dc1e86efd00680901a53b494

services/web/frontend/stylesheets/app/plans-v2.less

@@ -417,7 +417,7 @@ span.plans-v2-license-picker-educational-discount-learn-more-container {
         }
       }
 
-      td:nth-last-child(2) {
+      td:last-child {
         background-color: @ol-blue-gray-0;
 
         .plans-v2-table-cell {