message: docs: add Caizin to the user list
diff: @@ -73,6 +73,7 @@ Join our growing community!
  - [Apollo GraphQL](https://www.apollographql.com/) [@evans]
  - [Astronomer](https://www.astronomer.io) [@ryw]
  - [Avesta Technologies](https://avestatechnologies.com/) [@TheRum]
  +- [Caizin](https://caizin.com/) [@tejaskatariya]
  - [Careem](https://www.careem.com/) [@SamraHanifCareem]
  - [Cloudsmith](https://cloudsmith.io) [@alancarson]
  - [CnOvit](http://www.cnovit.com/) [@xieshaohu]
  