chore(deps): update helm release kube-prometheus-stack to v84

Author: renovate[bot]

cluster/homelab/apps/observeability/helm-release.sensitive.sops.yaml

@@ -10,7 +10,7 @@ spec:
   chart:
     spec:
       chart: kube-prometheus-stack
-      version: 82.18.0
+      version: 84.5.0
       interval: 10m
       sourceRef:
         kind: HelmRepository