Fixed tests

no issue

- Adapted tests because of gscan bump

core/test/utils/fixtures/themes/test-theme/assets/css/screen.css

@@ -1854,7 +1854,8 @@ Usage (In Ghost editor):
     text-align: center;
 }
 
-.kg-image-card {
+.kg-image-card,
+.kg-gallery-card {
     margin: 0 0 1.5em;
 }
 
@@ -1862,6 +1863,10 @@ Usage (In Ghost editor):
     margin: -1.0em 0 1.5em;
 }
 
+.kg-gallery-container {}
+.kg-gallery-row {}
+.kg-gallery-image {}
+
 .kg-embed-card {
     display: flex;
     flex-direction: column;