Fix typo in labbook_answer_spec:  'labbok' → 'labbook'
Fix typo in labbook_answer_spec:  'labbok' → 'labbook'

https://www.pivotaltracker.com/story/show/97734786

concord-consortium/lara,concord-consortium/lara,concord-consortium/lara,concord-consortium/lara,concord-consortium/lara