hotfix: only one h1 header allowed

Signed-off-by: Claudio W. <[email protected]>

Author: ovflowd

apps/site/pages/en/blog/vulnerability/march-2025-ci-incident.md

@@ -67,7 +67,7 @@ As a volunteer-driven organization, we rely on people dedicating their time to w
 
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-# Node.js Test CI Security Incident – Notice
+## Node.js Test CI Security Incident – Notice
 
 On March 21st, the Node.js project received a security report regarding our development infrastructure via [our bug bounty program](https://hackerone.com/nodejs). We immediately restricted access while implementing corrective actions.
 The reported issue did not impact the Node.js runtime and there is no risk to users of Node.js. No action by Node.js users is required.