Update with new exporters added upstream

content/docs/instrumenting/exporters.md

@@ -25,6 +25,7 @@ wide variety of JVM-based applications, for example [Kafka](http://kafka.apache.
 
 ### Databases
    * [Aerospike exporter](https://github.com/alicebob/asprom)
+   * [ClickHouse exporter](https://github.com/f1yegor/clickhouse_exporter)
    * [Consul exporter](https://github.com/prometheus/consul_exporter) (**official**)
    * [CouchDB exporter](https://github.com/gesellix/couchdb-exporter)
    * [InfluxDB exporter](https://github.com/prometheus/influxdb_exporter) (**official**)
@@ -92,6 +93,7 @@ wide variety of JVM-based applications, for example [Kafka](http://kafka.apache.
    * [BIG-IP exporter](https://github.com/ExpressenAB/bigip_exporter)
    * [BIND exporter](https://github.com/digitalocean/bind_exporter)
    * [Blackbox exporter](https://github.com/prometheus/blackbox_exporter) (**official**)
+   * [BOSH exporter](https://github.com/cloudfoundry-community/bosh_exporter)
    * [Jenkins exporter](https://github.com/lovoo/jenkins_exporter)
    * [JMX exporter](https://github.com/prometheus/jmx_exporter) (**official**)
    * [Meteor JS web framework exporter](https://atmospherejs.com/sevki/prometheus-exporter)