Update CHANGELOG.md
Update CHANGELOG.md

adding single stat to the change log, as well as other notable changes of the month
influxdb/influxdb,influxdata/influxdb,influxdb/influxdb,li-ang/influxdb,influxdb/influxdb,influxdata/influxdb,influxdb/influxdb,li-ang/influxdb,influxdb/influxdb,nooproblem/influxdb,nooproblem/influxdb,nooproblem/influxdb,nooproblem/influxdb,influxdb/influxdb,nooproblem/influxdb