[stable/grafana] add missing multiline indicator (#11997)

Signed-off-by: Jannis Oeltjen <oss@jcoeltjen.de>

stable/grafana/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: grafana
-version: 2.2.2
+version: 2.2.3
 appVersion: 6.0.0
 kubeVersion: "^1.8.0-0"
 description: The leading tool for querying and visualizing time series and metrics.

stable/grafana/templates/dashboards-json-configmap.yaml

@@ -15,7 +15,7 @@ metadata:
 data:
 {{- range $key, $value := $dashboards }}
 {{- if (or (hasKey $value "json") (hasKey $value "file")) }}
-{{ print $key | indent 2 }}.json:
+{{ print $key | indent 2 }}.json: |-
 {{- if hasKey $value "json" }}
 {{ $value.json | indent 4 }}
 {{- end }}