Update CHANGELOG.md

[akelity]

update broken link

Checklist

• your branch will not cause merge conflict with master
• run npm test
• tests are included
• the documentation is updated or integrated accordingly with your changes
• the code will follow the lint rules and style of the project
• you are not committing extraneous files or sensible data

[coveralls]

coverage: 94.793%. remained the same when pulling 9cab9a9 on akelity-patch-1 into b7dd0ea on master.