chore(deps): update container image tccr.io/truecharts/thanos to 0.31.0 (#8121)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[tccr.io/truecharts/thanos](https://togithub.com/truecharts/containers)
| digest | `5fb6e90` -> `c3dd4d4` |

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charts/enterprise/prometheus/Chart.yaml

@@ -29,7 +29,7 @@ sources:
   - https://github.com/prometheus-community/helm-charts
   - https://github.com/prometheus-operator/kube-prometheus
 type: application
-version: 8.0.20
+version: 8.0.21
 annotations:
   truecharts.org/catagories: |
     - metrics

charts/enterprise/prometheus/values.yaml

@@ -4,7 +4,7 @@ image:
 
 thanosImage:
   repository: tccr.io/truecharts/thanos
-  tag: 0.31.0@sha256:5fb6e900c9c94756a0296d9348e1d3e2fd731804d3be56461ea0189e48452299
+  tag: 0.31.0@sha256:c3dd4d4b01b3da8739ef7f8e51aab210fcaa728b5a18c1c97ff3f926958cf030
 
 alertmanagerImage:
   repository: tccr.io/truecharts/alertmanager