added newline in doc file

docs/monitoring-other-namespaces.md

@@ -25,4 +25,4 @@ local kp = (import 'kube-prometheus/kube-prometheus.libsonnet') + {
 { ['prometheus-' + name]: kp.prometheus[name] for name in std.objectFields(kp.prometheus) } +
 { ['grafana-' + name]: kp.grafana[name] for name in std.objectFields(kp.grafana) }
 
-```
+```