Add changelog note for 2.2.3

[pisaacs]

2.2.3 is available on Ruby Gems (https://rubygems.org/gems/jquery-datatables-rails/versions) but I don't see this version listed in the Change Log.

[ricardodovalle]

I added a small note, I am sorry and thank you very much.

2.2.3

- updated Commanche responsible plugin.

[pisaacs]

Thank you!