[docs] [issue34317] Improve docstring Environment variables in Windows NT

[sakamoto aya]

New submission from sakamoto aya <aya.sakamoto at outlook.com>:

Expired link in windows.rst:  
https://support.microsoft.com/en-us/help/100843/environment-variables-in-windows-nt

May I make a suggestion?

The new link:https://www.microsoft.com/en-us/wdsi/help/folder-variables

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assignee: docs at python
components: Documentation
messages: 322944
nosy: HiyashiChuka, docs at python
priority: normal
severity: normal
status: open
title: Improve docstring   Environment variables in Windows NT
type: behavior
versions: Python 3.6, Python 3.7, Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34317>
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