Add web entry for Windows

Windows requires a "web" entry

config/config.php

@@ -35,6 +35,7 @@ return [
 			'version' => '2.2.2.6192',
 			'versionstring' => 'Nextcloud Client 2.2.2 (build 6192)',
 			'downloadUrl' => 'https://download.nextcloud.com/desktop/stable/ownCloud-2.2.2.6192-setup.exe',
+			'web' => 'https://nextcloud.com/install/#install-clients',
 		],
 		'macos' => [
 			'version' => '2.2.2.3472',