Cosmetic fixes (#131)

* changing syntax when referring to map keys without lookup function

* Replacing map function with actual maps for easier reading

* replacing map function in example

* replacing map function in workers.tf and readme/main

* update changelog

main.tf

@@ -27,7 +27,7 @@
 *   source                = "terraform-aws-modules/eks/aws"
 *   cluster_name          = "test-eks-cluster"
 *   subnets               = ["subnet-abcde012", "subnet-bcde012a"]
-*   tags                  = "${map("Environment", "test")}"
+*   tags                  = {Environment = "test"}
 *   vpc_id                = "vpc-abcde012"
 * }
 * ```