Update Helm release victoria-metrics-k8s-stack to v0.61.6 (#100)

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

Author: renovate[bot]

infra/argo-apps/victoria-metrics.yaml

@@ -16,7 +16,7 @@ spec:
       targetRevision: HEAD
       ref: myRepo
     - repoURL: https://victoriametrics.github.io/helm-charts
-      targetRevision: 0.60.1
+      targetRevision: 0.61.6
       chart: victoria-metrics-k8s-stack
       helm:
         valueFiles: