Update the example of the changelog task to use start/end date filtering

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@272062 13f79535-47bb-0310-9956-ffa450edef68

proposal/myrmidon/src/make/sample.ant

@@ -284,7 +284,8 @@ Legal:
     </target>
 
     <target name="changelog-test">
-        <changelog basedir="." destfile="../../changelog.txt">
+        <changelog basedir="." destfile="../../changelog.txt"
+            start="20 Feb 2002" end="20 Mar 2002">
             <user displayname="Peter Donald" userid="donaldp"/>
         </changelog>
     </target>