gh-44871: Fix the module reference in the NEWS entry

The documented module is xml.parsers.expat, there is no target for
pyexpat.

Author: serhiy-storchaka

Misc/NEWS.d/next/Library/2026-08-12-21-34-12.gh-issue-44871.Rt7Nv2.rst

@@ -1,4 +1,4 @@
-:mod:`pyexpat` parser objects have a new method
+Parser objects of the :mod:`XML parser <xml.parsers.expat>` have a new method
 :meth:`!GetSpecifiedAttributeCount`.
 It tells how many of the attributes reported to :attr:`!StartElementHandler`
 were given in the start tag rather than defaulted from the DTD.