chore: pin workload_identity example to k8s 1.23 (#1315)

chore: pin workload_identity example to k8s 1.23

Author: apeabody

examples/workload_identity/main.tf

@@ -38,6 +38,8 @@ module "gke" {
   remove_default_node_pool = true
   service_account          = "create"
   node_metadata            = "GKE_METADATA"
+  # https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/1313
+  kubernetes_version = "1.23"
   node_pools = [
     {
       name         = "wi-pool"

modules/workload-identity/README.md

@@ -14,6 +14,8 @@ The `terraform-google-workload-identity` can create service accounts for you,
 or you can use existing accounts; this applies for both the Google and
 Kubernetes accounts.
 
+Note: This module currently supports Kubernetes <= 1.23.
+
 ### Creating a Workload Identity
 
 ```hcl