syntax fix in slack section (#879)
syntax fix in slack section (#879)

the all -> all the
adityacs/kapacitor,influxdata/kapacitor,sputnik13/kapacitor,titilambert/kapacitor,titilambert/kapacitor,adityacs/kapacitor,sputnik13/kapacitor,muxinc/kapacitor,titilambert/kapacitor,muxinc/kapacitor,sputnik13/kapacitor,yosiat/kapacitor,adityacs/kapacitor,yosiat/kapacitor,influxdata/kapacitor,influxdb/kapacitor,influxdata/kapacitor,influxdb/kapacitor,muxinc/kapacitor,influxdb/kapacitor,yosiat/kapacitor