message: add zalando to adpoters list
diff: | [Grab](https://www.grab.com) | [@althafh](https://github.com/althafh) | Initial work as a unified interface for all of Grab's internal tooling |
  | [Telenor Sweden](https://www.telenor.se) | [@O5ten](https://github.com/O5ten) | Building a developer portal for scaffolding projects towards our unified build environment and microservice stacks |
  | [Fiverr](https://www.fiverr.com) | [@nirga](https://github.com/nirga) | Unifying separate tools that developers are using today (i.e. monitoring, dead letter queues management, etc.) into a single platform. |
  +| [Zalando SE](https://www.zalando.de) | [@leviferreira](https://github.com/leviferreira) | Building V2 of the Internal Development Portal. |
  