chore(deps): update valkey docker tag to v0.4.0 (#4572)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [valkey](https://github.com/valkey-io/valkey) | minor | `0.3.0` → `0.4.0` |

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### Configuration

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This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Reviewed-on: #4572
Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net>
Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/helm/authentik/Chart.lock

@@ -10,6 +10,6 @@ dependencies:
   version: 7.8.0
 - name: valkey
   repository: oci://harbor.alexlebens.net/helm-charts
-  version: 0.3.0
-digest: sha256:91be5940938eaf90746d44fa4b4afe0771c06e28e15c7d1c0228a84c59bf4200
-generated: "2026-03-09T22:03:48.426441206Z"
+  version: 0.4.0
+digest: sha256:fad7059feb4ac80e06cd571a56215d56e4894eba69fb54aaa1e53ced9ec1b2b1
+generated: "2026-03-09T23:06:05.608952158Z"