message: Add unity as adopter
diff: | [Palo Alto Networks](https://www.paloaltonetworks.com) | [Jeremy Guarini](https://github.com/jeremyguarini), [Brian Lomeland](https://github.com/bbbmmmlll), [Palo Alto Networks](https://github.com/PaloAltoNetworks) | Developer portal, service catalog, documentation and tooling |
  | [Signal Iduna Group](https://www.signal-iduna.de/) | [Jonas Thomsen](https://github.com/JoThomsen) | Developer Portal, documentation, monitoring, service catalog for our insurance ecosystem |
  | [Tradeshift](https://www.tradeshift.com/) | [Soren Mathiasen](https://github.com/sorenmat) | Developer Portal: documentation, monitoring, service templates, service catalog for our micro services |
  +
  +| [Unity](https://unity.com) | [Ted Cordery](https://github.com/TeddyBallGame) | A centralized service catalog with documentation for our service engineers. |
  