Fix route typo on job board crud page

Author: lilliealbert

sites/en/job-board/crud_and_resourceful_routing.step

@@ -16,7 +16,7 @@ MARKDOWN
 discussion_box "CRUD", "Talk through the different uses for the HTTP verbs. What is their general purpose, and what are we specifically using them for??"
 
 message <<-MARKDOWN
-  To have a useful app, we need to be able to create job postings, see them all and their details, change them, and delete them. The way that Rails wants us to do this is by following RESTful routing conventions, which are perfectly encapsulated by the output of `resource :jobs` in our routes.rb file.
+  To have a useful app, we need to be able to create job postings, see them all and their details, change them, and delete them. The way that Rails wants us to do this is by following RESTful routing conventions, which are perfectly encapsulated by the output of `resources :jobs` in our routes.rb file.
 
   In Rails we work with seven main verbs, which map to different CRUD actions and controller actions: