Merge pull request #40987 from nextcloud/backport/40977/stable27

[stable27] Update version.php to owncloud 10.13

Author: AndyScherzinger

version.php

@@ -42,7 +42,7 @@
 		'27.1' => true,
 	],
 	'owncloud' => [
-		'10.11' => true,
+		'10.13' => true,
 	],
 ];