Fix rake skills task

Do I need a description really?
Just as they name says, find_or_create will look for an existing record if there is not then it will create one (will try to save it to the db), on the other hand, find_or_initialize will look for an existing record if there is not then it will create a new instance (thus it won't try to save it to the db); there is a third method find_or_create_by! which will raise exceptions when the record cannot be created, more info at: http://guides.rubyonrails.org/active_record_querying.html#find-or-build-a-new-object