doc: fix grammar nit

Co-authored-by: Mike McCready <[email protected]>

Author: trivikr

doc/api/corepack.md

@@ -12,7 +12,7 @@ added:
 
 > Stability: 1 - Experimental
 
-Corepack is no longer be distributed with Node.js 25+.
-Please refer to [Corepack repository][] for documentation.
+Corepack is no longer distributed with Node.js 25+.
+Please refer to the [Corepack repository][] for documentation.
 
 [Corepack repository]: https://github.com/nodejs/corepack