NEWS: clarify "ubygems.rb" entry

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60702 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

NEWS

@@ -241,7 +241,7 @@ with all sufficient information, see the ChangeLog file or Redmine
   Removed from stdlib. [Feature #10169]
 
 * Rubygems
-  * Removed "ubygems.rb" file from stdlib. It's needless after the Ruby 1.9.
+  * Removed "ubygems.rb" file from stdlib. It's needless since Ruby 1.9.
 
 === C API updates