Fix Sass build

sass/components/breadcrumb.sass

@@ -47,11 +47,11 @@ $breadcrumb-item-separator-color: $grey-light !default
   // Alignment
   &.is-centered
     ol,
-      ul
+    ul
       justify-content: center
   &.is-right
     ol,
-      ul
+    ul
       justify-content: flex-end
   // Sizes
   &.is-small