Bump omnibus-software from `9c01df0` to `28a9db0` in /omnibus
Bump omnibus-software from `9c01df0` to `28a9db0` in /omnibus

Bumps [omnibus-software](https://github.com/chef/omnibus-software) from `9c01df0` to `28a9db0`.
- [Release notes](https://github.com/chef/omnibus-software/releases)
- [Commits](https://github.com/chef/omnibus-software/compare/9c01df0dbe8124bfbe2edbff6e93dfdf41942435...28a9db0795189580b0d260de670e55ddd9f073f2)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
chef/chef-dk,chef/chef-dk,chef/chef-dk