Logout redirection call must reach the server

On Firefox 130 the logout (301 redirection to admin page) is getting cached and hence the logout action does not take place. Adding Cache-control to specify the browser to not-cache this is required for logout to work properly.

bl-kernel/helpers/redirect.class.php

@@ -24,6 +24,7 @@ class Redirect {
 
 	public static function admin()
 	{
+		header('Cache-Control: no-store');
 		self::url(HTML_PATH_ADMIN_ROOT);
 	}
-}
+}