chore(ui): update modal style

Author: xiejay97

packages/ui/src/styles/components/modal.scss

@@ -55,7 +55,7 @@
   }
 
   @include e(title) {
-    margin-bottom: 4px;
+    margin-bottom: 12px;
     font-size: 1.1em;
     font-weight: 500;
   }