Link to achievements.api.php is broken

Problem/Motivation

I want to use this module on my site. But when I went to see the examples listed in #2 in the "To begin creating achievements" section, the link to achievement.api.php is broken. Seems it has been that way a long time. Can it be fixed please?

Steps to reproduce

Go to the module's page on drupal.org: https://www.drupal.org/project/achievements
Scroll down to the "To begin creating achievements" section.
Click on the link for the achievements.api.php file.

Proposed resolution

Please fix documentation to the right link.

Remaining tasks

User interface changes

API changes

Data model changes