* Made the cluster variable visible in dashboards
* Made the repo reusable with multiple EKS clusters
* Relabled the input variable from create_grafana_data_source to create_prometheus_data_source
* Validation added to cluster_name variable
* Update ref to eks-cluster-with-vpc on v4.13.1 (#121)
* Added cluster_name validation with message (#118)
* Error message typo fixed to follow the standards.
* Adding requested new line at the end