remove duplicate customization label from Doc/using/windows.rst

Author: adqm

Doc/using/windows.rst

@@ -382,7 +382,6 @@ again. To completely clean up all Python runtimes, run with ``--purge`` before
 uninstalling the Python install manager.
 
 .. _pymanager-config:
-.. _customization:
 .. _customizing-default-python-versions:
 .. _customization-via-ini-files:
 .. _launcher-ini:

Lib/pydoc.py

@@ -1866,7 +1866,7 @@ def collect_dunders(symbols):
         '__format__', '__hash__', '__bool__',
     ]
     for bd in basic_dunders:
-        dunders[bd] = ('class-customization', 'SPECIALMETHODS')
+        dunders[bd] = ('customization', 'SPECIALMETHODS')
 
     attribute_dunders = [
         '__getattr__', '__getattribute__', '__setattr__', '__delattr__',