elements/components/libfdk-aac.bst: Move to current upstream
Seems this is being used in Arch: https://gitlab.archlinux.org/archlinux/packaging/packages/libfdk-aac/-/blob/main/PKGBUILD?ref_type=heads#L16
Not sure why we were using that custom branch, maybe there is a good reason
Backport of !19169
Edited by Javier Jardón