chore: bump cos in example to latest (#152)

Author: shemau

examples/complete/main.tf

@@ -198,7 +198,7 @@ module "secret_manager_imported_cert" {
 # create a COS instance to create the service credential for
 module "cloud_object_storage" {
   source                 = "terraform-ibm-modules/cos/ibm"
-  version                = "7.1.4"
+  version                = "8.2.11"
   resource_group_id      = module.resource_group.resource_group_id
   region                 = var.region
   cos_instance_name      = "${var.prefix}-cos"