[issue45732] Make python.org Windows and macOS installers use Tk 8.6.12

[Terry J. Reedy]

Change by Terry J. Reedy <tjreedy at udel.edu>:


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title: Update python.org Windows and macOS installers to use Tk 8.6.12 -> Make python.org Windows and macOS installers use Tk 8.6.12

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45732>
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