* add EL9 to meta/main.yml
* require Ansible >= 2.11 as Rocky Linux is only supported with this version or above
* ansible-lint: use community.general.pacman module instead of ansible.builtin.pacman for Archlinux setup
* add support for Rocky Linux 9 and AlmaLinux 9
* add openSUSE Leap 15.4 to README.md
* update CHANGELOG.md