feat(eks-v2-alpha): eks-v2-alpha is now in developer preview

Author: aemada-aws

packages/@aws-cdk/aws-eks-v2-alpha/package.json

@@ -116,7 +116,7 @@
     "node": ">= 18.0.0"
   },
   "stability": "experimental",
-  "maturity": "experimental",
+  "maturity": "developer-preview",
   "awslint": {
     "exclude": [
       "*:*"