Change string -> any (#67)

The code expects a map: https://github.com/cn-terraform/terraform-aws-ecs-fargate-service/blob/main/main.tf#L117

Something like:
`{
    type = string
 }`

variables.tf

@@ -75,7 +75,7 @@ variable "ordered_placement_strategy" {
 
 variable "deployment_controller" {
   description = "(Optional) Deployment controller"
-  type        = list(string)
+  type        = list(any)
   default     = []
 }