chore(deps): update terraform terraform-ibm-modules/observability-agents/ibm to v1.15.1 (#310)

Author: terraform-ibm-modules-ops

examples/multiple_mzr_clusters/main.tf

@@ -185,7 +185,7 @@ module "observability_instances" {
 
 module "observability_agents_1" {
   source  = "terraform-ibm-modules/observability-agents/ibm"
-  version = "1.15.0"
+  version = "1.15.1"
   providers = {
     helm = helm.helm_cluster_1
   }
@@ -199,7 +199,7 @@ module "observability_agents_1" {
 
 module "observability_agents_2" {
   source  = "terraform-ibm-modules/observability-agents/ibm"
-  version = "1.15.0"
+  version = "1.15.1"
   providers = {
     helm = helm.helm_cluster_2
   }