chore(nextcloud): update image oci.trueforge.org/containerforge/nginx digest to 3387da0 (#43797)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[oci.trueforge.org/containerforge/nginx](https://ghcr.io/trueforge-org/nginx)
([source](https://hub.docker.com/_/nginx)) | digest | `5d6667c` ->
`3387da0` |

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charts/stable/nextcloud/Chart.yaml

@@ -51,5 +51,5 @@ sources:
   - https://hub.docker.com/r/clamav/clamav
   - https://hub.docker.com/r/collabora/code
 type: application
-version: 40.6.3
+version: 40.6.4
 

charts/stable/nextcloud/values.yaml

@@ -5,7 +5,7 @@ image:
 nginxImage:
   repository: oci.trueforge.org/containerforge/nginx
   pullPolicy: IfNotPresent
-  tag: "1.24.0@sha256:5d6667cece86ba7fdfde0ef729c3bab759da1f504f5431f2645656acb785a1d1"
+  tag: "1.24.0@sha256:3387da01e8c33cdd02efa318ad9fe778942d8f00118fe811cbfe213b251d5805"
 imaginaryImage:
   repository: oci.trueforge.org/containerforge/nextcloud-imaginary
   pullPolicy: IfNotPresent