Bump omnibus from `fb2a005` to `dd57896` in /omnibus
Bump omnibus from `fb2a005` to `dd57896` in /omnibus

Bumps [omnibus](https://github.com/chef/omnibus) from `fb2a005` to `dd57896`.
- [Release notes](https://github.com/chef/omnibus/releases)
- [Commits](https://github.com/chef/omnibus/compare/fb2a0058e37d4bede556d085714d54a5ded99f58...dd5789621fa32da5846b9cb92ea902015265734c)

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