fix(grafana): update image ghcr.io/kiwigrid/k8s-sidecar 2.7.1 → 2.7.3 (#48152)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[ghcr.io/kiwigrid/k8s-sidecar](https://redirect.github.com/kiwigrid/k8s-sidecar)
| patch | `2670f25` → `694950d` |

---

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### Release Notes

<details>
<summary>kiwigrid/k8s-sidecar (ghcr.io/kiwigrid/k8s-sidecar)</summary>

###
[`v2.7.3`](https://redirect.github.com/kiwigrid/k8s-sidecar/compare/2.7.1...2.7.3)

[Compare
Source](https://redirect.github.com/kiwigrid/k8s-sidecar/compare/2.7.1...2.7.3)

</details>

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charts/stable/grafana/Chart.yaml

@@ -40,5 +40,5 @@ sources:
   - https://grafana.com/
   - https://hub.docker.com/r/grafana/grafana
 type: application
-version: 23.4.0
+version: 23.4.1
 

charts/stable/grafana/values.yaml

@@ -6,7 +6,7 @@ image:
 
 sidecarImage:
   repository: ghcr.io/kiwigrid/k8s-sidecar
-  tag: 2.7.1@sha256:2670f251f80d990635460c0116497a9cc3202069e8826f1a279af300ecd9f75e
+  tag: 2.7.3@sha256:694950d736c8b532eba4006527ccbdac98fefc9f30b3346ba2de50b6cad91c94
 
 # Define extra dashboards to be provisioned
 # Supports 2 formats: