set version to 2.0.0 for upcoming stable release

Signed-off-by: Michael Kaufmann <d00p@froxlor.org>

install/froxlor.sql.php

@@ -696,7 +696,7 @@ opcache.validate_timestamps'),
 	('system', 'distribution', ''),
 	('system', 'update_channel', 'stable'),
 	('system', 'updatecheck_data', ''),
-	('system', 'update_notify_last', '2.0.0-beta1'),
+	('system', 'update_notify_last', '2.0.0'),
 	('system', 'traffictool', 'goaccess'),
 	('api', 'enabled', '0'),
 	('2fa', 'enabled', '1'),