Capitalize V8 in AUTHORS file.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@196 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

AUTHORS

 # Below is a list of people and organizations that have contributed
-# to the v8 project.  Names should be added to the list like so:
+# to the V8 project.  Names should be added to the list like so:
 #
 #   Name/Organization <email address>