Init version in files/joomla.xml manifest for 6.0

Author: richard67

administrator/manifests/files/joomla.xml

@@ -6,8 +6,8 @@
 	<authorUrl>www.joomla.org</authorUrl>
 	<copyright>(C) 2019 Open Source Matters, Inc.</copyright>
 	<license>GNU General Public License version 2 or later; see LICENSE.txt</license>
-	<version>5.2.0-alpha1-dev</version>
-	<creationDate>2024-05</creationDate>
+	<version>6.0.0-alpha-dev</version>
+	<creationDate>2024-06</creationDate>
 	<description>FILES_JOOMLA_XML_DESCRIPTION</description>
 
 	<scriptfile>administrator/components/com_admin/script.php</scriptfile>