meta: notify tsc on changes in SECURITY.md

PR-URL: #51259
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

.github/CODEOWNERS

@@ -17,6 +17,7 @@
 /CONTRIBUTING.md @nodejs/tsc
 /doc/contributing/*.md @nodejs/tsc
 /GOVERNANCE.md @nodejs/tsc
+/SECURITY.md @nodejs/tsc
 /LICENSE @nodejs/tsc
 /onboarding.md @nodejs/tsc