chore(deps): update terraform terraform-ibm-modules/observability-instances/ibm to v3 (#210)

Author: terraform-ibm-modules-ops

tests/resources/existing-resources/instances/main.tf

@@ -32,7 +32,7 @@ module "cos" {
 
 module "cloud_monitoring" {
   source                  = "terraform-ibm-modules/observability-instances/ibm//modules/cloud_monitoring"
-  version                 = "2.18.1"
+  version                 = "3.0.1"
   resource_group_id       = module.resource_group.resource_group_id
   region                  = var.region
   instance_name           = "${var.prefix}-mon"