fix: updated Observability instances module to 3.4.2 to pull in update that ensures log routing tenant name meets required criteria (#261)

Author: ocofaigh

solutions/instances/main.tf

@@ -242,7 +242,7 @@ module "cloud_monitoring_crn_parser" {
 module "observability_instance" {
   depends_on        = [time_sleep.wait_for_atracker_cos_authorization_policy]
   source            = "terraform-ibm-modules/observability-instances/ibm"
-  version           = "3.4.1"
+  version           = "3.4.2"
   region            = var.region
   resource_group_id = module.resource_group.resource_group_id