message: chore(docs): update content block cards readme with style import
  Update the ContentBlockCards README with the style import
diff: @@ -17,6 +17,8 @@ Here's a quick example to get you started.
  @import '@carbon/type/scss/font-face/sans';
  @include carbon--font-face-mono();
  @include carbon--font-face-sans();
  +
  +@import "@carbon/ibmdotcom-styles/scss/patterns/blocks/content-block-cards/content-block-cards";
  ```
  ```javascript
  