message: Update ADOPTERS.md
  added booking.com
diff: @@ -225,3 +225,4 @@ _You can do this by using the [Adopter form](https://info.backstage.spotify.com/
  | [Operate First](https://www.operate-first.cloud/) | [Tom Coufal](https://github.com/tumido), [Sam Kopecky](https://github.com/samokopecky) | Backstage provides us with a public service catalog and serves as a gateway to our community cloud. Our instance is publicly available to everyone [here](https://service-catalog.operate-first.cloud/) ([source](https://github.com/operate-first/service-catalog)) |
  | [Tractable AI](https://tractable.ai/) | [Stephan Schielke](https://github.com/stephanschielke) | We are hitting a critical point in our scale (100+ engineers) and need to get a handle on discoverability and ownership. The Service Catalog, TechDocs and Search are essential to us to achieve that. |
  | [Garanti BBVA Teknoloji](https://www.linkedin.com/company/garanti-teknoloji/) | [Caglar Cataloglu](https://github.com/crozwise) | We are using Backstage focusing on improving experience of developers, minimizing friction from idea to production. We call our portal as "Hyperspace" and very excited for our community (2000+ engineers) that finally we have a platform to boost our productivity!
  +| [Booking.com](https://www.linkedin.com/company/booking.com/) | [Mesut Yilmazyildirim](https://www.linkedin.com/in/myilmazyildirim) | We are adopting backstage as the new reliability platform inside the companand. We are migrating UIs of our internal developer tools to backstage for a better user experience.
  