Update clustering.md
Update clustering.md
Tomcat-Engineering/docs.influxdata.com,influxdb/docs.influxdata.com,influxdata/docs.influxdata.com,influxdb/docs.influxdata.com,influxdb/docs.influxdata.com,influxdata/docs.influxdata.com,influxdata/docs.influxdata.com,Tomcat-Engineering/docs.influxdata.com,influxdata/docs.influxdata.com,influxdata/docs.influxdata.com,Tomcat-Engineering/docs.influxdata.com