Fix Java version.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1744855 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/changes/release-notes.vm

@@ -25,7 +25,7 @@ INTRODUCTION:
 This document contains the release notes for the ${version} version of Apache Commons CSV.
 Commons CSV reads and writes files in variations of the Comma Separated Value (CSV) format.
 
-CSV requires at least Java 7.0.
+CSV requires at least Java 6.
 
 $introduction.replaceAll("(?<!\015)\012", "
 ").replaceAll("(?m)^ +","")