chore(deps): update terraform terraform-ibm-modules/event-notifications/ibm to v1.10.21 (#168)

Author: terraform-ibm-modules-ops

examples/complete/main.tf

@@ -29,7 +29,7 @@ module "cos" {
 
 module "event_notification" {
   source            = "terraform-ibm-modules/event-notifications/ibm"
-  version           = "1.10.20"
+  version           = "1.10.21"
   resource_group_id = module.resource_group.resource_group_id
   name              = "${var.prefix}-en"
   tags              = var.resource_tags