initial_alert.erb in capybara-3.36.0

- old
+ new

@@ -1,5 +1,6 @@
-<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
+<!DOCTYPE html>
+<html lang="en">
   <body>
     <div>
       Initial alert page
     </div>
     <script>