fix(deps): update helm release nextcloud to v8.9.0

Author: renovate[bot]

k8s/bases/apps/nextcloud/helm-release.yaml

@@ -11,7 +11,7 @@ spec:
   chart:
     spec:
       chart: nextcloud
-      version: 8.7.0
+      version: 8.9.0
       sourceRef:
         kind: HelmRepository
         name: nextcloud