_content/security: fix header for CNA page

Change-Id: I774fadd8d05decc737f1a95abca5b8520f4baf54
Reviewed-on: https://go-review.googlesource.com/c/website/+/408316
Reviewed-by: Julie Qiu <julieqiu@google.com>
Reviewed-by: Jamal Carvalho <jamal@golang.org>
diff --git a/_content/security/vulndb/policy.md b/_content/security/vulndb/policy.md
index 541f937..7c33778 100644
--- a/_content/security/vulndb/policy.md
+++ b/_content/security/vulndb/policy.md
@@ -1,11 +1,11 @@
-<!--{
-  "Title": "Go CNA"
-}-->
+---
+title: Go CNA
+layout: article
+---
 
 **This page is a work in progress.**
 
 ## Overview
-
 The Go CNA is a
 [CVE Numbering Authority](https://www.cve.org/ProgramOrganization/CNAs), which issues
 [CVE IDs](https://www.cve.org/ResourcesSupport/Glossary?activeTerm=glossaryCVEID) and publishes