pythongh-115872: Doc: remove obsolete reference to MSI packages (pyth…

…on#115873)

Doc/using/windows.rst

@@ -14,7 +14,7 @@ know about when using Python on Microsoft Windows.
 
 Unlike most Unix systems and services, Windows does not include a system
 supported installation of Python. To make Python available, the CPython team
-has compiled Windows installers (MSI packages) with every `release
+has compiled Windows installers with every `release
 <https://www.python.org/downloads/>`_ for many years. These installers
 are primarily intended to add a per-user installation of Python, with the
 core interpreter and library being used by a single user. The installer is also