Bump org.apache.commons:commons-parent from 78 to 79

The changes report is generated with Doxia 2 as changes.html instead of
changes-report.html

Author: garydgregory

src/site/xdoc/index.xml

@@ -91,7 +91,7 @@ See the
 for the latest releases.<br />
 </p>
 <p>
-<a href="changes-report.html">Change reports</a> are also available.
+<a href="changes.html">Change reports</a> are also available.
 </p>
 <p>
 For previous releases, see the <a href="https://archive.apache.org/dist/commons/codec/">Apache Archive</a>