A new post (or a custom post type is that option is selected) will be created every time a release is made on GitHub. You can display the release post with your other posts or use the shortcode to generate changelogs or links to the latest release.

Release listener for GitHub

Listens to a GitHub webhook and creates a new post every time a release is made.

jordanleven

For developers who are deploying multiple themes, it’s useful to have a full version history that details new features, improvements, and bug fixes. With Release Notes, this is simpler than ever.
Using the provided .json template and your own style.css main stylesheet, you can organize your theme deployments in releases (major, minor, and bug fixes).
Features
<ul>
<li>Works with single installations and Multisite</li>
<li>Works with parent themes and child themes</li>
<li>Parses releases notes into easy-to-read sections that show users what features are new with each new release</li>
</ul>
Feature Requests and Bug Reports
Please report any feature requests you have or bugs you encounter <a href="https://wordpress.org/support/plugin/release-notes" rel="ugc">under the Support tab</a>. This is a new plugin and I’m hoping to add more user-requested features to make this useful to developers.
Grunt Integration
Are you a Grunt user? Check out <a href="https://www.npmjs.com/package/grunt-release-notes-to-readme" rel="nofollow ugc">release-notes-to-readme on npmJS</a>. This package can be used to parse our your release notes into a nice ReadMe.md format that can be included in your theme.

Release Notes

Release Notes is a WordPress plugin that help you keep track of features that have been added over time to your themes.

Release listener for GitHub vs Release Notes