Update exporters.md (#660)

content/docs/instrumenting/exporters.md

@@ -94,6 +94,7 @@ wide variety of JVM-based applications, for example [Kafka](http://kafka.apache.
    * [JMX exporter](https://github.com/prometheus/jmx_exporter) (**official**)
    * [Munin exporter](https://github.com/pvdh/munin_exporter)
    * [New Relic exporter](https://github.com/jfindley/newrelic_exporter)
+   * [Pingdom exporter](https://github.com/giantswarm/prometheus-pingdom-exporter)
    * [scollector exporter](https://github.com/tgulacsi/prometheus_scollector)
    * [SNMP exporter](https://github.com/prometheus/snmp_exporter) (**official**)
    * [StatsD exporter](https://github.com/prometheus/statsd_exporter) (**official**)
@@ -105,6 +106,7 @@ wide variety of JVM-based applications, for example [Kafka](http://kafka.apache.
    * [BOSH exporter](https://github.com/cloudfoundry-community/bosh_exporter)
    * [Dovecot exporter](https://github.com/kumina/dovecot_exporter)
    * [Jenkins exporter](https://github.com/lovoo/jenkins_exporter)
+   * [Kemp LoadBalancer exporter](https://github.com/giantswarm/prometheus-kemp-exporter)
    * [Meteor JS web framework exporter](https://atmospherejs.com/sevki/prometheus-exporter)
    * [Minecraft exporter module](https://github.com/Baughn/PrometheusIntegration)
    * [PowerDNS exporter](https://github.com/janeczku/powerdns_exporter)