message: Add open to first expandable
diff: @@ -95,7 +95,7 @@ CSS
  .embla__slide {
  position: relative; /* Needed if loop: true */
  - flex: 0 0 100%; /* Choose any width */
  + flex: 0 0 100%; /* Choose any slide width */
  }
  ```
  @@ -132,7 +132,7 @@ const embla = EmblaCarousel(emblaNode, {
  ##### `align`
  -<details>
  +<details open>
  <summary>
  Align the slides relative to the carousel viewport.
  </summary>
  