https://lang.moodle.org/local/amos/view.php?t=1744375280&v=l&l=en_fix&c=admin&s&n=1&e=1&d=gravatardefaulturl_help

The language string core_admin:gravatardefaulturl_help contains an outdated link to the Gravatar documentation.

Currently, the URL in the string is:
https://en.gravatar.com/site/implement/images/

However, Gravatar has updated their documentation, and the correct new link is:
https://docs.gravatar.com/api/avatars/images/