add Giant Swarm to adopters
This PR adds Giant Swarm as an adopter :partying_face:
- [Expedia](https://www.expedia.com)
- [Facelift](https://www.facelift-bbt.com/en)
- [finleap connect](https://connect.finleap.com/)
+- [Giant Swarm](https://www.giantswarm.io)
- [HomeChoice](https://www.homechoice.co.za/)
- [HP Inc](https://www8.hp.com/us/en/home.html)
- [In Loco](https://inloco.com.br/en/)
