message: Add Gitpod link to contributing.md
diff: @@ -47,6 +47,8 @@ If you are already part of the organization on GitHub, clone the repository dire
  git clone https://github.com/ariakit/ariakit.git
  ```
  +Alternatively, you can [open the project in Gitpod](https://gitpod.io/#https://github.com/ariakit/ariakit) and skip to [Creating a component](#creating-a-component).
  +
  <div align="right">
  <a href="#basic-tutorial">&uarr; back to top</a></b>
  </div>
  