[en][ja] Mention regression of Hash#reject

Author: sorah

en/news/_posts/2014-02-24-ruby-2-1-1-is-released.md

@@ -21,6 +21,8 @@ and [ChangeLog](http://svn.ruby-lang.org/repos/ruby/tags/v2_1_1/ChangeLog) for d
 Following the previously announced [changed versioning policy of Ruby 2.1](https://www.ruby-lang.org/en/news/2013/12/21/semantic-versioning-after-2-1-0/),
 this version is simply called "2.1.1".
 
+__Update:__ We've noticed one regression in `Hash#reject`. For its detail, see: https://www.ruby-lang.org/en/news/2014/03/10/regression-of-hash-reject-in-ruby-2-1-1
+
 ## Download
 
 * <http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.1.tar.bz2>

ja/news/_posts/2014-02-24-ruby-2-1-1-is-released.md

@@ -16,6 +16,8 @@ lang: ja
 
 なお以前お伝えしましたとおり、Ruby 2.1 では[新しいバージョン表記](https://www.ruby-lang.org/ja/news/2013/12/21/semantic-versioning-after-2-1-0/)を採用していますので、単純に「Ruby 2.1.1」というのがこのリリースの名称になります。
 
+__追記:__ Ruby 2.1.1 において、`Hash#reject` のデグレードを発見しています。詳細はこちらをご覧ください: https://www.ruby-lang.org/ja/news/2014/03/10/regression-of-hash-reject-in-ruby-2-1-1
+
 ## Download
 
 * <http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.1.tar.bz2>