Update 4.6-final.md - Fix new references to branch names

doc/4.6-final.md

@@ -16,10 +16,10 @@ The user `releaser` on `latest.civicrm.org` has a suitable configuration in `~/s
 
  * Note the original branch, such as `4.6`.
  * Note the intended version, such as `4.6.28` or `4.6.29`.
-   * In civicrm-core.git repo, check that the code in `master` correctly references `4.6.X`:
-     * https://github.com/civicrm/civicrm-core/blob/master/xml/version.xml
-     * https://github.com/civicrm/civicrm-core/blob/master/sql/civicrm_generated.mysql
-     * https://github.com/civicrm/civicrm-core/tree/master/CRM/Upgrade/Incremental
+   * In civicrm-core.git repo, check that the code in `4.6` correctly references `4.6.X`:
+     * https://github.com/civicrm/civicrm-core/blob/4.6/xml/version.xml
+     * https://github.com/civicrm/civicrm-core/blob/4.6/sql/civicrm_generated.mysql
+     * https://github.com/civicrm/civicrm-core/tree/4.6/CRM/Upgrade/Incremental
    *  In Jenkins, review the scheduled tests for `4.6` and determine if anything should block the RC.
      * https://test.civicrm.org/job/CiviCRM-Core-Matrix/