gh-151403: Use os.PathLike.__fspath__ reference in NEWS to fix docs build

Author: tonghuaroot

Misc/NEWS.d/next/Library/2026-06-12-22-46-31.gh-issue-151403.DalZWh.rst

@@ -1,3 +1,3 @@
 Fixed a crash in :class:`subprocess.Popen` (and ``_posixsubprocess.fork_exec``)
-when an ``argv`` item's :meth:`~object.__fspath__` concurrently mutates the
+when an ``argv`` item's :meth:`~os.PathLike.__fspath__` concurrently mutates the
 ``args`` sequence being converted.