ENGCOM-7630: Use Variable for border-radius #28548

 - Merge Pull Request #28548 from Scarbous/magento2:patch-1
 - Merged commits:
   1. eface05
   2. 9bd16ba
   3. a59cd76

Author: magento-engcom-team

app/design/frontend/Magento/blank/web/css/source/_extends.less

@@ -1110,7 +1110,7 @@
     .abs-shopping-cart-items {
         .action {
             &.continue {
-                border-radius: 3px;
+                border-radius: @button__border-radius;
                 font-weight: @font-weight__bold;
                 .lib-link-as-button();
                 .lib-button(