chore(deps): update container image kube-prometheus-stack to v56.21.4@923897b by renovate (#19075)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[kube-prometheus-stack](https://togithub.com/prometheus-operator/kube-prometheus)
([source](https://togithub.com/prometheus-community/helm-charts)) |
patch | `56.21.0` -> `56.21.4` |

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This PR has been generated by [Renovate
Bot](https://togithub.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4yMzUuMSIsInVwZGF0ZWRJblZlciI6IjM3LjI0OS4zIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIn0=-->

charts/premium/prometheus/Chart.yaml

@@ -7,7 +7,7 @@ annotations:
   truecharts.org/min_helm_version: "3.11"
   truecharts.org/train: premium
 apiVersion: v2
-appVersion: 2.51.1
+appVersion: 2.51.0
 dependencies:
   - name: common
     version: 20.2.9
@@ -17,7 +17,7 @@ dependencies:
     tags: []
     import-values: []
   - name: kube-prometheus-stack
-    version: 56.21.0
+    version: 56.21.4
     repository: oci://ghcr.io/prometheus-community/charts
     condition: ""
     alias: kps
@@ -43,4 +43,4 @@ sources:
   - https://quay.io/thanos/thanos
   - https://hub.docker.com/r/bitnami/alertmanager
 type: application
-version: 17.12.4
+version: 17.12.5