update skeleton

see hcdc/software-templates/helm-chart-template!24

.cruft.json

 {
   "template": "https://codebase.helmholtz.cloud/hcdc/software-templates/helm-chart-template.git",
-  "commit": "b9786ff61e7580c9bf5dd4bb8caab2f75e02e586",
+  "commit": "abf3156dadd777a0cdb8a71e0f819de2d477a496",
   "checkout": null,
   "context": {
     "cookiecutter": {

templates/nginx/persistentvolumeclaims.yaml

@@ -16,7 +16,7 @@ metadata:
     {{- include "nginx.labels" $ | nindent 4 }}
     io.kompose.service: {{ $name | quote }}
     {{- if $options.excludeFromBackup }}
-    excludeFromBackup: true
+    excludeFromBackup: "true"
     {{- end }}
   name: {{ $name | quote }}
   {{- if or (not (hasKey $options "keep")) (eq (coalesce $options.keep false) true) }}