Merge pull request #56868 from nextcloud/backport/56791/stable31

[stable31] patch the version file to allow upgrading from owncloud  > v10.13

Author: AndyScherzinger

version.php

@@ -21,6 +21,9 @@
 	],
 	'owncloud' => [
 		'10.13' => true,
+		'10.14' => true,
+		'10.15' => true,
+		'10.16' => true,
 	],
 ];