chore(deps): update container image ghcr.io/linuxserver/piwigo to 13.8.0@5a9fd99 (#15615)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[ghcr.io/linuxserver/piwigo](https://togithub.com/linuxserver/docker-piwigo/packages)
([source](https://togithub.com/linuxserver/docker-piwigo)) | digest |
`081c29f` -> `5a9fd99` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://togithub.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy44MS4wIiwidXBkYXRlZEluVmVyIjoiMzcuODEuMCIsInRhcmdldEJyYW5jaCI6Im1hc3RlciJ9-->

charts/stable/piwigo/Chart.yaml

@@ -1,7 +1,7 @@
 kubeVersion: '>=1.24.0'
 apiVersion: v2
 name: piwigo
-version: 7.0.19
+version: 7.0.20
 appVersion: 13.8.0
 description: A photo gallery software for the web.
 home: https://truecharts.org/charts/stable/piwigo

charts/stable/piwigo/values.yaml

@@ -1,7 +1,7 @@
 image:
   repository: ghcr.io/linuxserver/piwigo
   pullPolicy: IfNotPresent
-  tag: 13.8.0@sha256:081c29f5e0b8b1c9ffc0b08f1a20cbf5901a2082bc42f3893b2141b29260e1c3
+  tag: 13.8.0@sha256:5a9fd996a07f273046fa83fc9ea15328d9559e67c6a63944bc23a9c20f478c3b
 securityContext:
   container:
     runAsNonRoot: false