Fix year in release date from 2012 to 2013.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1482921 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

doap_codec.rdf

@@ -66,7 +66,7 @@ limitations under the License.
       </Version>
       <Version>
         <name>commons-codec</name>
-        <created>2012-04-28</created>
+        <created>2013-04-28</created>
         <revision>1.8</revision>
       </Version>
     </release>