helm-chart: Fix headless service

Signed-off-by: babykart <babykart@gmail.com>

script/helm/garage/templates/service-headless.yaml

@@ -6,7 +6,7 @@ metadata:
   labels:
     {{- include "garage.labels" . | nindent 4 }}
 spec:
-  type: {{ .Values.service.type }}
+  clusterIP: None
   ports:
     - port: {{ .Values.service.s3.api.port }}
       targetPort: 3900
@@ -18,4 +18,4 @@ spec:
       name: s3-web
   selector:
     {{- include "garage.selectorLabels" . | nindent 4 }}
-{{- end }}
+{{- end }}