Update release notes

I saw the latest release of Chocolatey and your release notes are very close to what I generate with a tool I am working on called [GitReleaseNotes](https://github.com/JakeGinnivan/GitReleaseNotes). So I decided to use this as a demo and hopefully help you out at the same time.
This issue https://github.com/chocolatey/chocolatey/issues/492 was closed without being fixed. How should it be set up for GRN to handle that?