docs: update supported k8s version (#2949)

Resolves #2718

Signed-off-by: Andy Chen <[email protected]>

docs/installation.md

@@ -102,12 +102,9 @@ docker run quay.io/argoproj/kubectl-argo-rollouts:master version
 
 ## Supported versions
 
-At any point in time the officially supported version of Argo Rollouts is the latest released one, on Kubernetes versions N and N-1 (as supported by the Kubernetes project itself).
+Check [e2e testing file]( https://github.com/argoproj/argo-rollouts/blob/master/.github/workflows/e2e.yaml#L40-L44) to see what the Kubernetes version is being fully tested.
 
-For example if the latest minor version of Argo Rollouts is 1.2.1 and supported Kubernetes versions are 1.24, 1.23 and 1.22 then the following combinations are supported:
-
-* Argo Rollouts 1.2.1 on Kubernetes 1.24
-* Argo Rollouts 1.2.1 on Kubernetes 1.23
+You can switch to different tags to see what relevant Kubernetes versions were being tested for the respective version.
 
 ## Upgrading Argo Rollouts