Release commit log link broken

[clabe45]

Etro uses ShipJS to deploy new versions. Along with publishing versions to NPM and doing some other release chores, by default, Ship.js creates GitHub releases, extracting the release notes from CHANGELOG.md. Since the header link's destination is declared at the bottom of CHANGELOG.md, a ShipJS bug prevents the link's destination from being included in the GitHub release notes, so the link does not render properly (example). I tried to fix this in ccd6c55, but the issue is still happening. I believe it's because releases needs to be an object, not an array (ShipJS docs).