[DEV-13006] Increase vertical spacing for Callouts

Author: e1himself

src/elements/Callout/Callout.scss

@@ -1,7 +1,7 @@
 @import "styles/variables";
 
 .prezly-slate-callout {
-    margin: $spacing-2 0;
+    margin: $spacing-3 0;
 
     color: $color-text;
     font-weight: 500;