fix(blog): remove duplicate blog title for jan 2026 (nodejs#8545)

Author: malav2110

apps/site/pages/en/blog/vulnerability/january-2026-dos-mitigation-async-hooks.md

@@ -7,8 +7,6 @@ layout: blog-post
 author: Matteo Collina and Joyee Cheung
 ---
 
-# Mitigating Denial-of-Service Vulnerability from Unrecoverable Stack Space Exhaustion for React, Next.js, and APM Users
-
 ## TL;DR
 
 Node.js/V8 makes a best-effort attempt to recover from stack space exhaustion with a catchable error, which frameworks have come to rely on for service availability. A bug that only reproduces when `async_hooks` are used would break this attempt, causing Node.js to exit with 7 directly without throwing a catchable error when recursions in user code exhaust the stack space. This makes applications whose recursion depth is controlled by unsanitized input vulnerable to Denial-of-Service attacks. This silently affects countless applications because: