feat(tf): update terragrunt dependency github.com/terraform-aws-modul…

…es/terraform-aws-eks to v20.28.0 (#288)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

terragrunt/live/production/eu-west-1/clusters/demo/eks/terragrunt.hcl

@@ -26,7 +26,7 @@ locals {
 }
 
 terraform {
-  source = "github.com/terraform-aws-modules/terraform-aws-eks?ref=v20.27.0"
+  source = "github.com/terraform-aws-modules/terraform-aws-eks?ref=v20.28.0"
 
   after_hook "kubeconfig" {
     commands = ["apply"]