Add another small note about unicorn:duplicate.

README.md

@@ -33,15 +33,16 @@ require 'capistrano-unicorn'
 Add unicorn restart task hook:
 
 ```ruby
-after 'deploy:restart', 'unicorn:reload'   # app IS NOT preloaded
-after 'deploy:restart', 'unicorn:restart'  # app preloaded
+after 'deploy:restart', 'unicorn:reload'    # app IS NOT preloaded
+after 'deploy:restart', 'unicorn:restart'   # app preloaded
+after 'deploy:restart', 'unicorn:duplicate' # before_fork hook implemented (zero downtime deployments)
 ```
 
 Create a new configuration file `config/unicorn.rb` or `config/unicorn/STAGE.rb`, 
 where stage is your deployment environment.
 
 Example config - [examples/rails3.rb](https://github.com/sosedoff/capistrano-unicorn/blob/master/examples/rails3.rb). 
-Please refer to unicorn documentation for more examples and configuration options.
+Please refer to Unicorn documentation for more examples and configuration options.
 
 ### Deploy