Fix bug 1521288: Use Co-authored-by in the commit message (#1601)
Fix bug 1521288: Use Co-authored-by in the commit message (#1601)

The Co-authored-by trailer allows you to state that PR has multiple authors, and using this trailer allows platforms like GitHub to reflect that in the UI.

reference: https://help.github.com/en/github/committing-changes-to-your-project/creating-a-commit-with-multiple-authors

Co-authored-by: Tomer Cohen <d6911363a106df680044b70c03ec73e09e9e98e6@users.noreply.github.com>
mozilla/pontoon,mathjazz/pontoon,mozilla/pontoon,jotes/pontoon,mathjazz/pontoon,mathjazz/pontoon,jotes/pontoon,mathjazz/pontoon,mozilla/pontoon,jotes/pontoon,mozilla/pontoon,jotes/pontoon,mathjazz/pontoon,mozilla/pontoon