Bump ansible from 2.7.16 to 2.9.20 in /linux_setup
Bump ansible from 2.7.16 to 2.9.20 in /linux_setup

Bumps [ansible](https://github.com/ansible/ansible) from 2.7.16 to 2.9.20.
- [Release notes](https://github.com/ansible/ansible/releases)
- [Commits](https://github.com/ansible/ansible/compare/v2.7.16...v2.9.20)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
zachliu/dotfiles,zachliu/dotfiles