message: docs: add Skyscanner to users list
diff: @@ -160,6 +160,9 @@ Join our growing community!
  ### Government
  - [City of Ann Arbor, MI](https://www.a2gov.org/) [@sfirke]
  +### Travel
  +- [Skyscanner](https://www.skyscanner.net/) [@cleslie, @stanhoucke]
  +
  ### Others
  - [AI inside](https://inside.ai/en/)
  - [Dropbox](https://www.dropbox.com/) [@bkyryliuk]
  