chore(helm): update image ghcr.io/linuxserver/piwigo digest to 76cb46c (#30619)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[ghcr.io/linuxserver/piwigo](https://redirect.github.com/linuxserver/docker-piwigo/packages)
([source](https://redirect.github.com/linuxserver/docker-piwigo)) |
digest | `71b8611` -> `76cb46c` |

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charts/stable/piwigo/Chart.yaml

@@ -42,4 +42,4 @@ sources:
   - https://github.com/linuxserver/docker-piwigo
   - https://github.com/truecharts/charts/tree/master/charts/stable/piwigo
 type: application
-version: 15.6.0
+version: 15.6.1

charts/stable/piwigo/values.yaml

@@ -1,7 +1,7 @@
 image:
   repository: ghcr.io/linuxserver/piwigo
   pullPolicy: IfNotPresent
-  tag: 15.3.0@sha256:71b8611488449b4a20ba5486e0f12f00c65862ab0249dfc8a40f7704a296ce3b
+  tag: 15.3.0@sha256:76cb46c95ba91c2c148358d1aac95287acd01e6850d6d627984a9de4dca40aab
 securityContext:
   container:
     runAsNonRoot: false