fix taxonomies for Spree 2.2

get_taxonomies was replaced with @taxonomies in Spree 2.2:

https://github.com/spree/spree/commit/fc491a77c4daf30d9253e5cb4459b89bf084f048#diff-f933052c93bf16f259a8676979abc18d
Typo in order_details

Just a missing <% end %>.