meta: loop userland-migrations in deprecations

PR-URL: #60299
Reviewed-By: Richard Lau <richard.lau@ibm.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jacob Smith <jacob@frende.me>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>

Author: legendecas

.github/CODEOWNERS

@@ -228,3 +228,6 @@
 /lib/path.js @nodejs/path
 /lib/path/* @nodejs/path
 /test/parallel/test-path-* @nodejs/path
+
+# userland-migrations
+/doc/api/deprecations.md @nodejs/userland-migrations