fix: check for an empty first in wp_site_admin_email_change_notification()

Author: dilipbheda

src/wp-includes/functions.php

@@ -8123,7 +8123,7 @@ function wp_site_admin_email_change_notification( $old_email, $new_email, $optio
 	$send = true;
 
 	// Don't send the notification to the default 'admin_email' value or an empty value.
-	if ( '[email protected]' === $old_email || empty( $old_email ) ) {
+	if ( empty( $old_email ) || '[email protected]' === $old_email ) {
 		$send = false;
 	}