meta: fix contributing codeowners

PR-URL: nodejs#54641
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: avivkeller

.github/CODEOWNERS

@@ -15,7 +15,7 @@
 /.github/ISSUE_TEMPLATE/* @nodejs/tsc
 /CODE_OF_CONDUCT.md @nodejs/tsc
 /CONTRIBUTING.md @nodejs/tsc
-/doc/contributing/*.md @nodejs/tsc
+/doc/contributing/**/* @nodejs/tsc
 /GOVERNANCE.md @nodejs/tsc
 /SECURITY.md @nodejs/tsc
 /LICENSE @nodejs/tsc