_content/security/vuln: fix vuln endpoint in database doc and add example

Change-Id: I650ab0394f14a4cb71ba0d587222373c3c4741d7
Reviewed-on: https://go-review.googlesource.com/c/website/+/431416
Reviewed-by: Julie Qiu <julieqiu@google.com>
Reviewed-by: Tatiana Bradley <tatiana@golang.org>
diff --git a/_content/security/vuln/database.md b/_content/security/vuln/database.md
index cfdbd28..1f8fce9 100644
--- a/_content/security/vuln/database.md
+++ b/_content/security/vuln/database.md
@@ -67,8 +67,8 @@
 - `$base/$module.json`
    List of vulnerability entries for that module ([example](https://vuln.go.dev/golang.org/x/crypto.json)).
 
-- `$base/$vuln/vuln.json`
-   An individual Go vulnerability report.
+- `$base/ID/$vuln.json`
+   An individual Go vulnerability report ([example](https://vuln.go.dev/ID/GO-2022-0191.json)).
 
 ## Schema