ICU-12189 Updated tzdata version in readme.

X-SVN-Rev: 38554
diff --git a/readme.html b/readme.html
index d86324a..73d0cdc 100644
--- a/readme.html
+++ b/readme.html
@@ -950,7 +950,7 @@
 </ol>
 
 <h2 class="doc"><a name="timezone"></a>About ICU4J Time Zone</h2>
-<p>ICU4J 57 Release Candidate includes time zone data version 2016a, which is the latest one as of
+<p>ICU4J 57 Release Candidate includes time zone data version 2016b, which is the latest one as of
 the release date. However, time zone data is frequently updated in response
 to changes made by local governments around the world.  If you need to update
 the time zone data, please refer the ICU user guide topic