Additional tag for autoscaling enabled (#454)

* Additional tag for autoscaling_enabled

* Added changelog

CHANGELOG.md

@@ -19,6 +19,12 @@ project adheres to [Semantic Versioning](http://semver.org/).
 
 # History
 
+## [[v5.1.1](https://github.com/terraform-aws-modules/terraform-aws-eks/compare/v5.1.0...v5.1.1)] - 2019-07-30]
+
+### Added
+
+ - Added new tag in `worker.tf` with autoscaling_enabled = true flag (by @insider89)
+
 ## [[v5.1.0](https://github.com/terraform-aws-modules/terraform-aws-eks/compare/v5.0.0...v5.1.0)] - 2019-07-30]
 
 ### Added

workers.tf

@@ -77,6 +77,11 @@ resource "aws_autoscaling_group" "workers" {
         "value"               = "owned"
         "propagate_at_launch" = true
       },
+      {
+        "key"                 = "k8s.io/cluster/${aws_eks_cluster.this.name}"
+        "value"               = "owned"
+        "propagate_at_launch" = true
+      },
       {
         "key" = "k8s.io/cluster-autoscaler/${lookup(
           var.worker_groups[count.index],