500.html in vault-rails-0.9.0

- old
+ new

@@ -1,5 +1,10 @@
 <!DOCTYPE html>
+<!--
+ Copyright (c) HashiCorp, Inc.
+ SPDX-License-Identifier: MPL-2.0
+-->
+
 <html>
 <head>
   <title>We're sorry, but something went wrong (500)</title>
   <meta name="viewport" content="width=device-width,initial-scale=1">
   <style>