fix: update carbonCover to use aspect-ratio for responsive height adjustment

Author: medyo

src/features/adv/components/AdvBanner.css

@@ -260,7 +260,8 @@
   max-width: none;
 }
 .advFeed .carbonCover {
-  height: 255px;
+  aspect-ratio: 16 / 9;
+  height: auto;
   margin-bottom: 12px;
 }
 .advFeed .carbonCoverImage {