fix labels for PodDisruptionBudget on helm (#623)

production/helm/loki/Chart.yaml

 name: loki
-version: 0.9.1
+version: 0.9.2
 appVersion: 0.0.1
 kubeVersion: "^1.10.0-0"
 description: "Loki: like Prometheus, but for logs."

production/helm/loki/templates/pdb.yaml

@@ -3,13 +3,14 @@ apiVersion: policy/v1beta1
 kind: PodDisruptionBudget
 metadata:
   name: {{ template "loki.fullname" . }}
-  app: {{ template "loki.name" . }}
-  heritage: {{ .Release.Service }}
-  release: {{ .Release.Name }}
-  chart: {{ template "loki.chart" . }}
+  labels:
+    app: {{ template "loki.name" . }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+    chart: {{ template "loki.chart" . }}
 spec:
   selector:
     matchLabels:
       app: {{ template "loki.name" . }}
 {{ toYaml .Values.podDisruptionBudget | indent 2 }}
-{{- end -}}
\ No newline at end of file
+{{- end -}}