Update Helm release kube-prometheus-stack to v39.13.3

Author: renovate-bot

flux/cluster-apps/kube-prometheus-stack/kube-prometheus-stack-helmrelease-kustomization/kube-prometheus-stack-helmrelease.yaml

@@ -11,7 +11,7 @@ spec:
         kind: HelmRepository
         name: prometheus-community
         namespace: flux-system
-      version: 39.12.1
+      version: 39.13.3
   install:
     crds: Create
   interval: 1m