[regicide] updated resign doc to include reason redis isn't touched
[regicide] updated resign doc to include reason redis isn't touched

rbramwell/sensu,cread/sensu,miyakawataku/sensu,solarkennedy/sensu,upfluence/sensu,sensu/sensu,yonglehou/sensu,bf4/sensu,roobert/sensu,keymone/sensu,portertech/sensu,crewton/sensu,m4ce/sensu,somic/sensu