How is the contributors section on a github release page formed

On each release we generate our contribution list out of the email addresses that are attached to the commits that go into this release. However, there’s another “Contributors” list at the bottom of the release page that refers to accounts totally unrelated to the contribution list.

How is that list of accounts calculated and how can we disable this feature?

Example:

On the page

The “Contributors” list refers to a GitHub account “redhat” that has nothing to do with our contributions