chore(deps): update terraform terraform-ibm-modules/cloud-monitoring/ibm to v1.6.4 (#74)

Author: terraform-ibm-modules-ops

tests/existing-resources/main.tf

@@ -14,7 +14,7 @@ module "resource_group" {
 
 module "cloud_monitoring" {
   source            = "terraform-ibm-modules/cloud-monitoring/ibm"
-  version           = "1.6.3"
+  version           = "1.6.4"
   region            = var.region
   resource_group_id = module.resource_group.resource_group_id
   resource_tags     = var.resource_tags