[release-notes] Corrected a typo

[Simon Clark]

commit 659fb61ee20c348abd1733608575d9ea2bf279a2
Author: Simon Clark <simon.richard.clark at gmail.com>
Date:   Thu Oct 23 10:58:51 2014 +0100

    Corrected a typo

 en-US/Cluster.xml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/en-US/Cluster.xml b/en-US/Cluster.xml
index 901b2e6..1fd5d5d 100644
--- a/en-US/Cluster.xml
+++ b/en-US/Cluster.xml
@@ -53,7 +53,7 @@
     analysis programs, coupled with infrastructure for evaluating
     these programs. The salient property of Pig programs is that
     their structure is amenable to substantial parallelization,
-    which in turns enables them to handle very large data sets. At
+    which, in turn, enables them to handle very large data sets. At
     the present time, Pig's infrastructure layer consists of a
     compiler that produces sequences of Map-Reduce programs, for
     which large-scale parallel implementations already exist (e.g.,