addons: Update grafana from v4.6.2 to v4.6.3

* https://github.com/grafana/grafana/releases/tag/v4.6.3

addons/grafana/deployment.yaml

@@ -21,7 +21,7 @@ spec:
     spec:
       containers:
         - name: grafana
-          image: grafana/grafana:4.6.2
+          image: grafana/grafana:4.6.3
           env:
             - name: GF_SERVER_HTTP_PORT
               value: "8080"