ZP-748 Fixed typos in file description.

Released under the Affero GNU General Public License (AGPL) version 3.

src/lib/syncobjects/syncrightsmanagementtemplate.php

 <?php
 /***********************************************
-* File      :   syncrightsmanagementstemplate.php
+* File      :   syncrightsmanagementtemplate.php
 * Project   :   Z-Push
 * Descr     :   WBXML rights management template entities
 *               that can be parsed directly (as a stream)

src/lib/syncobjects/syncrightsmanagementtemplates.php

 <?php
 /***********************************************
-* File      :   syncrightsmanagementstemplates.php
+* File      :   syncrightsmanagementtemplates.php
 * Project   :   Z-Push
 * Descr     :   WBXML rights management templates entities
 *               that can be parsed directly (as a stream)