Add PlayStudios Asia to ADOPTERS.md
There's no going back now...
- [figo](https://www.figo.io/)
- [Just Football](https://justfootball.io)
- [Kairos](https://kairos.com)
+- [PlayStudios Asia](https://www.playstudios.asia)
- [Studyo](https://studyo.co)
- [In Loco](https://inloco.com.br/en/)
- [LeadIQ](https://leadiq.com)
