fix: add missing file

templates/registry-secret.yaml

+{{- if .Values.registryCred }}
+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ .Release.Name }}-regcred
+  labels:
+    app.kubernetes.io/name: {{ .Values.appName }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+  annotations:
+    "helm.sh/resource-policy": keep
+type: kubernetes.io/dockerconfigjson
+data:
+  .dockerconfigjson: {{ printf "{\"auths\": {\"%s\": {\"auth\": \"%s\"}}}" .Values.registryCred.registry (printf "%s:%s" .Values.registryCred.username .Values.registryCred.password | b64enc) | b64enc | quote }}
+{{- end }}