feat(helm-chart)!: Update Helm release thanos to 15.0.2

| datasource | package | from    | to     |
| ---------- | ------- | ------- | ------ |
| helm       | thanos  | 12.22.0 | 15.0.2 |

Author: Trux-Bot

kubernetes/hegira/apps/monitoring/thanos/app/helmrelease.yaml

@@ -9,7 +9,7 @@ spec:
   chart:
     spec:
       chart: thanos
-      version: 12.22.0
+      version: 15.0.2
       sourceRef:
         kind: HelmRepository
         name: bitnami-charts