chore(deps): update helm release nats to 1.3.15

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gitops/argocd/charts/messaging/nats/Chart.yaml

@@ -10,4 +10,4 @@ appVersion: 1.0.0
 dependencies:
 - name: nats
   repository: https://nats-io.github.io/k8s/helm/charts
-  version: 1.3.1
+  version: 1.3.15