List available k8s cluster versions for cluster creation

curl --request GET \
  --url https://api.gcore.com/cloud/v2/k8s/{project_id}/{region_id}/create_versions \
  --header 'APIKey: <api-key>'

{
  "count": 1,
  "results": [
    {
      "version": "v1.28.1"
    }
  ]
}