fix(area_maintenance): Cast updates_checked to object type for consistency

Changed the type casting of $updates_checked from a direct assignment to an explicit (object) cast to ensure proper object handling and type consistency in the update_data_version method.

Author: alex-render

core/area_maintenance/class.area_maintenance.php

@@ -1050,7 +1050,7 @@ public static function build_install_version() : object {
 	public static function update_data_version(object $options) : object {
 
 		// options
-			$updates_checked = $options->updates_checked;
+			$updates_checked = (object)$options->updates_checked;
 
 		// set time limit
 			set_time_limit ( 259200 );  // 3 days