update k8s version to v1.31.1 and image/node_shape version to VM.Standard.E3.Flex

Author: paulparkinson

infra/k8s/oke/terraform/containerengine.tf

@@ -39,7 +39,7 @@ resource "oci_containerengine_node_pool" "okell_node_pool" {
   compartment_id     = var.ociCompartmentOcid
   kubernetes_version = var.kubernetes_version
   name               = "Pool"
-  node_shape         = "VM.Standard.E2.1"
+  node_shape         = "VM.Standard.E3.Flex"
   node_config_details {
     placement_configs {
       availability_domain = data.oci_identity_availability_domain.ad1.name

infra/k8s/oke/terraform/main_var.tf

@@ -9,5 +9,5 @@ variable "vcnOcid" {}
 variable "kubernetes_version" {
   description = "OKE Version"
   type        = string
-  default     = "v1.29.1"
+  default     = "v1.31.1"
 }