Litlle bit typo chnages on callbacks file

Add the below callbacks method on the callbacks methods list:-
# * (8) <tt>before_destroy</tt>
  # * (9) <tt>after_destroy</tt>
  # * (10) <tt>before_update</tt>
  # * (11) <tt>after_update</tt>
  # * (12) <tt>around_update</tt>
  # * (13) <tt>around_create</tt>
  # * (14) <tt>around_save</tt>
  # * (15) <tt>around_destroy</tt>
  # * (16) <tt>around_update</tt>