update for 8.6.4 release [build_translations]

Author: jmckenna

en/download.txt

@@ -18,7 +18,7 @@ Current Release(s)
 
 * MapServer
 
-  * **2026-05-07** MapServer-8.6.3 `tar.gz <https://download.osgeo.org/mapserver/mapserver-8.6.3.tar.gz>`__ | `.zip <https://download.osgeo.org/mapserver/mapserver-8.6.3.zip>`__ | :ref:`Changelog <changelog-8-6>`
+  * **2026-06-01** MapServer-8.6.4 `tar.gz <https://download.osgeo.org/mapserver/mapserver-8.6.4.tar.gz>`__ | `.zip <https://download.osgeo.org/mapserver/mapserver-8.6.4.zip>`__ | :ref:`Changelog <changelog-8-6>`
   * **2025-09-19** MapServer-8.4.1 `tar.gz <https://download.osgeo.org/mapserver/mapserver-8.4.1.tar.gz>`__ | `.zip <https://download.osgeo.org/mapserver/mapserver-8.4.1.zip>`__ | :ref:`Changelog <changelog-8-4>`
   * **2024-09-02** MapServer-8.2.2 `tar.gz <https://download.osgeo.org/mapserver/mapserver-8.2.2.tar.gz>`__ | `.zip <https://download.osgeo.org/mapserver/mapserver-8.2.2.zip>`__ | :ref:`Changelog <changelog-8-2>`
   * **2024-06-11** MapServer-8.0.2 `tar.gz <https://download.osgeo.org/mapserver/mapserver-8.0.2.tar.gz>`__ | :ref:`Changelog <changelog-8-0>`

en/download_archives.txt

@@ -15,6 +15,8 @@
 Past Releases
 ..............................................................................
 
+* **2026-06-01** MapServer-8.6.4 `tar.gz <https://download.osgeo.org/mapserver/mapserver-8.6.4.tar.gz>`__ | `.zip <https://download.osgeo.org/mapserver/mapserver-8.6.4.zip>`__ | :ref:`Changelog <changelog-8-6>`
+
 * **2026-05-07** MapServer-8.6.3 `tar.gz <https://download.osgeo.org/mapserver/mapserver-8.6.3.tar.gz>`__ | `.zip <https://download.osgeo.org/mapserver/mapserver-8.6.3.zip>`__ | :ref:`Changelog <changelog-8-6>`
 
 * **2026-04-20** MapCache-1.16.0 `tar.gz <https://download.osgeo.org/mapserver/mapcache-1.16.0.tar.gz>`__ | `.zip <https://download.osgeo.org/mapserver/mapcache-1.16.0.zip>`__ | :ref:`Changelog <changelog-mapcache-1-16>`