Update pvc.yaml (#40)

range will breake without the yaml seperator 
added it 
"---"
Error Message:
msg":"Reconciler error","controller":"helmrelease","controllerGroup":"helm.toolkit.fluxcd.io","controllerKind":"HelmRelease","HelmRelease":{"name":"cryptpad","namespace":"cryptpad"},"namespace":"cryptpad","name":"cryptpad","reconcileID":"fefc06a9-21c9-4533-9c12-130ca9c53117","error":"error while running post render on files: map[string]interface {}(nil): yaml: unmarshal errors:\n  line 15: mapping key \"apiVersion\" already defined at line 2\n

Author: narutolied

charts/cryptpad/templates/pvc.yaml

@@ -1,5 +1,6 @@
 {{- if and .Values.persistence.enabled (not .Values.workloadStateful) }}
 {{- range $dir, $dirvalues := .Values.persistence.cryptpad }}
+---
 apiVersion: v1
 kind: PersistentVolumeClaim
 metadata: