doc: clarify future Corepack removal in v25+

PR-URL: #57825
Reviewed-By: Jordan Harband <ljharb@gmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Ulises Gascón <ulisesgascongonzalez@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

Author: trivikr

doc/api/corepack.md

@@ -12,10 +12,9 @@ added:
 
 > Stability: 1 - Experimental
 
-Documentation for this tool can be found on the [Corepack repository][].
+**Corepack will no longer be distributed starting with Node.js v25.**
 
-Despite Corepack being distributed with default installs of Node.js, the package
-managers managed by Corepack are not part of the Node.js distribution, and
-Corepack itself will no longer be distributed with Node.js 25+.
+Users currently depending on the bundled `corepack` executable from Node.js
+can switch to using the userland-provided [corepack][] module.
 
-[Corepack repository]: https://github.com/nodejs/corepack
+[corepack]: https://github.com/nodejs/corepack