fix(container): update thanos docker tag to v15.7.21

[mchesterbot]

This PR contains the following updates:

Package	Update	Change
thanos (source)	patch	15.7.20 -> 15.7.21

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Release Notes

bitnami/charts (thanos)

v15.7.21

• [bitnami/thanos] Update index cache config for sharded store gateway (#​28747)

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This PR has been generated by Renovate Bot.

[mchesterbot]

--- kubernetes/apps/monitoring/thanos/app Kustomization: flux-system/cluster-apps-thanos HelmRelease: monitoring/thanos

+++ kubernetes/apps/monitoring/thanos/app Kustomization: flux-system/cluster-apps-thanos HelmRelease: monitoring/thanos

@@ -13,13 +13,13 @@

       chart: thanos
       interval: 5m
       sourceRef:
         kind: HelmRepository
         name: bitnami-charts
         namespace: flux-system
-      version: 15.7.20
+      version: 15.7.21
   install:
     createNamespace: true
     remediation:
       retries: 3
     timeout: 20m
   interval: 30m

[mchesterbot]

--- HelmRelease: monitoring/grafana Deployment: monitoring/grafana

+++ HelmRelease: monitoring/grafana Deployment: monitoring/grafana

@@ -22,13 +22,13 @@

   template:
     metadata:
       labels:
         app.kubernetes.io/name: grafana
         app.kubernetes.io/instance: grafana
       annotations:
-        checksum/dashboards-json-config: 0a4ae436abc92490229bb1a4d2af93fe028e9efea8d697a2c1334b49b5cea3d9
+        checksum/dashboards-json-config: 102785869883ef24dd0ef334dafd71c9e05c4c248edcdd4b44e22589f8a47dfe
         checksum/sc-dashboard-provider-config: c942752180ddff51a3ab63b7d256cf3d856d90757b6f804cbc420562989d5a84
         kubectl.kubernetes.io/default-container: grafana
     spec:
       serviceAccountName: grafana
       automountServiceAccountToken: true
       securityContext: