chore(helm): update image docker.io/nginxinc/nginx-unprivileged digest to 9911618 (#40949)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[docker.io/nginxinc/nginx-unprivileged](https://redirect.github.com/nginx/docker-nginx-unprivileged)
| digest | `5faa864` -> `9911618` |

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charts/stable/nextcloud/Chart.yaml

@@ -53,5 +53,5 @@ sources:
   - https://hub.docker.com/r/collabora/code
   - https://hub.docker.com/r/nginxinc/nginx-unprivileged
 type: application
-version: 38.9.3
+version: 38.9.4
 

charts/stable/nextcloud/values.yaml

@@ -5,7 +5,7 @@ image:
 nginxImage:
   repository: docker.io/nginxinc/nginx-unprivileged
   pullPolicy: IfNotPresent
-  tag: 1.29.2@sha256:5faa8648305e93ff7b562a7a576d9f8ef8f5ed78d9c28765bb6551fe461f2606
+  tag: 1.29.2@sha256:991161869875a38dc8b6b3226e6d41c4e6481edc5521ca716362e35880b21a25
 imaginaryImage:
   repository: oci.trueforge.org/tccr/nextcloud-imaginary
   pullPolicy: IfNotPresent