revised formatting for CHANGELOG.md
revised formatting for CHANGELOG.md

channelcat/sanic,yunstanford/sanic,channelcat/sanic,ashleysommer/sanic,ashleysommer/sanic,lixxu/sanic,yunstanford/sanic,lixxu/sanic,yunstanford/sanic,channelcat/sanic,yunstanford/sanic,channelcat/sanic,lixxu/sanic,ashleysommer/sanic,lixxu/sanic