link doesnt work

this page https://github.com/ampproject/amp-toolbox/tree/master/packages/optimizer-express references this link: https://badge.fury.io/js/@ampproject/toolbox-optimizer-express

but it doesn't work

Open packages/optimizer-express on the master branch and inspect the referenced badge URL. Check whether the package name or destination has changed, then make the page’s reference resolve correctly and verify the rendered link works.

Written by the indexing model from the issue text.