Fix code according to guidelines

Co-Authored-By: Morgante Pell <morgante.pell@morgante.net>

Author: gajicdev

autogen/main/cluster.tf.tmpl

@@ -159,7 +159,7 @@ resource "google_container_cluster" "primary" {
  {% if beta_cluster %}
  dynamic "recurring_window"{
  for_each = local.cluster_maintenance_window_is_recurring
- content{
+ content {
  start_time = var.maintenance_start_time
  end_time = var.maintenance_end_time
  recurrence = var.maintenance_recurrence