message: adopters.md - add a line about the list and why to add
diff: +# Adopters
  +
  +_If you're using Backstage in your organization, please try to add your company name to this list. This really helps the project to gain momentum and credibility. It's a small contribution back to the project with a big impact._
  +
  | Organization | Contact | Description of Use |
  | --------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
  | [Spotify](https://www.spotify.com) | [@leemills83](https://github.com/leemills83) | Main interface towards all of Spotify's infrastructure and technical documentation. |
  