chore(helm): update image docker.io/nginxinc/nginx-unprivileged digest to 5524073 (#41400)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[docker.io/nginxinc/nginx-unprivileged](https://redirect.github.com/nginx/docker-nginx-unprivileged)
| digest | `f7f2bc9` -> `5524073` |

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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: 38.9.14
+version: 38.9.15
 

charts/stable/nextcloud/values.yaml

@@ -5,7 +5,7 @@ image:
 nginxImage:
   repository: docker.io/nginxinc/nginx-unprivileged
   pullPolicy: IfNotPresent
-  tag: 1.29.2@sha256:f7f2bc91670d746d9634fe8f3184d041a512cc9f7ad6afa0cd0b8a5cf27220f5
+  tag: 1.29.2@sha256:552407349aa673f06dc15c2c489fd585a1ff953b37533ed843ba0601e4d02d77
 imaginaryImage:
   repository: oci.trueforge.org/tccr/nextcloud-imaginary
   pullPolicy: IfNotPresent