RELEASING.md in sshkit-1.22.2 vs RELEASING.md in sshkit-1.23.0

@@ -7,10 +7,10 @@
 * You must be using Ruby >= 2.1.0.
 
 ## How to release
 
 1. Run `bundle install` to make sure that you have all the gems necessary for testing and releasing.
-2.  **Ensure the tests are passing by running `rake test`.** If functional tests fail, ensure you have [Vagrant](https://www.vagrantup.com) installed and have started it with `vagrant up`.
+2.  **Ensure the tests are passing by running `rake test`.** If functional tests fail, ensure you have [Docker installed](https://docs.docker.com/get-docker/) and running.
 3. Determine which would be the correct next version number according to [semver](http://semver.org/).
 4. Update the version in `./lib/sshkit/version.rb`.
 5. Commit the `version.rb` change with a message like "Preparing vX.Y.Z"
 6. Run `rake release`; this will tag, push to GitHub, and publish to rubygems.org
 7. Update the draft release on the [GitHub releases page](https://github.com/capistrano/sshkit/releases) to point to the new tag and publish the release