WIP: Bump chef-gem version to 12.21.4 to get updates to net-ssh dependency
net-ssh v4 was offically bumped in https://github.com/chef/chef/commit/31b5aabd2c2ff37b0eba63033971087f1c6db000
Closes #2727 (closed)
net-ssh v4 was offically bumped in https://github.com/chef/chef/commit/31b5aabd2c2ff37b0eba63033971087f1c6db000
Closes #2727 (closed)