Merge branch '5877-merge-changelog-md-authors-upgrade-md-into-dev-after-releasing-1-2-2' into '1.3-dev'

Resolve "Merge Changelog.md, Authors, UPGRADE.md into -dev after releasing 1.2.2"

Closes #5877

See merge request fusiondirectory/fd!375

(cherry picked from commit fadfbbbe)

ad76656d ✨ feat(1.2.2) Merge Changelog.md, Authors, UPGRADE.md into -dev after releasing 1.2.2