fix(vmware): correcting cluster variable

modules/vmware/main.tf

@@ -21,14 +21,12 @@ variable "vms" {
 }
 
 variable "cluster" {
-  type = map(object(
-    {
+  type = object(
       datacenter_name = string
       datastore_name = string
       resource_pool_name = string
       folder = string
-    }
-  ))
+  )
   description = "vSphere cluster definition"
 }