ISTWCMS-3574: updating width stylings for CTAs

source/_patterns/04-components/call-to-action/_call-to-action.scss

@@ -47,13 +47,17 @@ $faculties: 'org-default', 'org-ahs', 'org-art', 'org-eng', 'org-env', 'org-mat'
 
   &.uw-contained-width {
     @include uw-contained-width;
-    padding: 0 1rem;
+    padding: 0;
   }
 
   .uw-cta__aside {
     background-color: $uw-black;
     flex: 1 0 30%;
-    margin: 0 1rem;
+    margin: 0 1rem 0 0;
+  }
+
+  .uw-cta__aside:last-child {
+    margin: 0;
   }
 }