Add Exoscale to ADOPTERS.md (#92)

ADOPTERS.md

@@ -5,6 +5,7 @@ This list shows adopters of CEL-Playground. If you're using CEL Playground in an
 ## Adopters list (alphabetical)
 
 * [CEL](https://cel.dev) - CEL team refers users to the CEL Playground by Undistro when community members ask for help getting started. This has proven to be a valuable support tool and an important tool in helping people learn how to wield the language.
+* [Exoscale](https://exoscale.com) - Exoscale uses CEL for Identity and Access Management, we make use of the CEL Playground to test expressions, to understand the evaluation cost of expressions, and to share examples. 
 * [Getup](https://getup.io) - Getup is the original author of CEL Playground, we use the playground with our customers to help them learn how to make use of CEL within Kubernetes
 * [Ifood](https://www.ifood.com.br/) - Cel Playground helps me a lot in my CEL expression studies and is a valuable partner when it comes to important implementations in quick tests and immediate feedback, in addition to being able to simulate real scenarios. I love this tool.
 * [Kubernetes](https://kubernetes.io/docs/reference/access-authn-authz/validating-admission-policy) - CEL Playground is referenced within Kubernetes Validating Admission Policy to help users familiarize themselves with CEL before they try using it in their deployment.