Update readme for next release
Update readme for next release

fbelzunc/ghprb-plugin,mmitche/ghprb,fbelzunc/ghprb-plugin,ithaka/ghprb-plugin,arcadia/ghprb-plugin,dulvac/ghprb-plugin,arcadia/ghprb-plugin,DavidTanner/ghprb-plugin,mmitche/ghprb,jenkinsci/ghprb-plugin,ithaka/ghprb-plugin,DavidTanner/ghprb-plugin,janinko/ghprb,jenkinsci/ghprb-plugin,dulvac/ghprb-plugin,janinko/ghprb