ADCMS-9700 card-group-item bottom space (#12325)

### Related Ticket(s)

[ADCMS-9700](https://jsw.ibm.com/browse/ADCMS-9700)

### Description
Fixing c4d-card-group-item, I added a space of 16px between cards.
<img width="1170" height="1219" alt="image" src="https://github.com/user-attachments/assets/f5e84504-912f-4304-9c16-0453346d6c36" />

Author: Valentin-Sorin-Nicolae

packages/styles/scss/components/card-group/_card-group.scss

@@ -151,7 +151,7 @@
 
     &[grid-mode='condensed'] {
       .#{$prefix}--card {
-        margin-block-end: 0;
+        margin-block-end: $spacing-05;
       }
     }