Fix small typos and date formats in changelog
Fix small typos and date formats in changelog

diraol/kytos,cemsbr/kytos,cemsbr/kytos,erickvermot/kytos,erickvermot/kytos,diraol/kytos,macartur/kytos,erickvermot/kytos,cemsbr/kytos,diraol/kytos,kytos/kytos,kytos/kyco,renanrodrigo/kytos