add missing css for buttons

Author: kkartunov

src/shared/components/Contentful/Article/themes/default.scss

@@ -1,5 +1,6 @@
 @import "~styles/mixins";
 @import "~components/Contentful/default";
+@import "~components/buttons/themed/tc.scss";
 
 .wrapper {
   overflow-x: hidden;