Fix regional cluster example (#2385)
Fix regional cluster example (#2385)

Update regional cluster example to point cluster to google_container_cluster.regional.name rather than google_container_cluster.primary.name
terraform-providers/terraform-provider-google,hashicorp/terraform-provider-google,terraform-providers/terraform-provider-google,ubschmidt2/terraform-provider-google,hashicorp/terraform-provider-google,ubschmidt2/terraform-provider-google,hashicorp/terraform-provider-google,ubschmidt2/terraform-provider-google,terraform-providers/terraform-provider-google,hashicorp/terraform-provider-google,terraform-providers/terraform-provider-google,terraform-providers/terraform-provider-google,ubschmidt2/terraform-provider-google