gh-145311: fix NEWS blurb sphinx refs to private APIs

Author: lex00

Misc/NEWS.d/next/Library/2026-03-15-09-47-31.gh-issue-145311.tKxdj2.rst

@@ -1,5 +1,3 @@
 Fix :mod:`venv` and :mod:`ensurepip` hanging when stdin is connected to
-a pipe. :func:`subprocess.check_output` in
-:meth:`~venv.EnvBuilder._call_new_python` and :func:`subprocess.run` in
-:func:`ensurepip._run_pip` now pass ``stdin=subprocess.DEVNULL`` to
-prevent child processes from blocking on an inherited pipe descriptor.
+a pipe. Subprocess calls in both modules now pass ``stdin=subprocess.DEVNULL``
+to prevent child processes from blocking on an inherited pipe descriptor.