Remove RC indicator from release notes header
Remove RC indicator from release notes header

DavidAlphaFox/riak,authbox-lib/riak,GabrielNicolasAvellaneda/riak,laurenrother/riak,amyvmiwei/riak,yangchengjian/riak,biddyweb/riak,glickbot/riak,basho/riak,elkingtonmcb/riak