chore(helm): update image ghcr.io/linuxserver/grav digest to e592dbc (#28375)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[ghcr.io/linuxserver/grav](https://redirect.github.com/linuxserver/docker-grav/packages)
([source](https://redirect.github.com/linuxserver/docker-grav)) | digest
| `f3bfff0` -> `e592dbc` |

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to pin your dependencies.

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charts/stable/grav/Chart.yaml

@@ -36,4 +36,4 @@ sources:
   - https://github.com/linuxserver/docker-grav
   - https://github.com/truecharts/charts/tree/master/charts/stable/grav
 type: application
-version: 13.2.3
+version: 13.2.4

charts/stable/grav/values.yaml

@@ -1,7 +1,7 @@
 image:
   repository: ghcr.io/linuxserver/grav
   pullPolicy: IfNotPresent
-  tag: 1.7.47@sha256:f3bfff0e969282f3f717eff640d1521233975d578a6850976d429a21fd5d25f4
+  tag: 1.7.47@sha256:e592dbcd255e27627d0279350e55e5ed442a736f858d57670027364085d3a6c6
 service:
   main:
     ports: