Fix #20654 by reverting #20447 (#20665)

Cards must be inline-block in columns, otherwise they can get split across columns

scss/_card.scss

@@ -314,6 +314,7 @@
     column-gap: $card-columns-sm-up-column-gap;
 
     .card {
+      display: inline-block; // Don't let them vertically span multiple columns
       width: 100%; // Don't let them exceed the column width
     }
   }