Update CHANGELOG attribution.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6885 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

railties/CHANGELOG

 *SVN*
 
-* Generated migrations include timestamps by default.  #8501 [shane]
+* Generated migrations include timestamps by default.  #8501 [Shane Vitarana]
 
 * Drop Action Web Service from rails:freeze:edge.  [Jeremy Kemper]