Add htmllive to make.bat

[lorenzo-delsignore]

This pull request fixes#1366 issue by adding the htmllive command to the make.bat script.

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📚 Documentation preview 📚: https://cpython-devguide--1373.org.readthedocs.build/

[ghost]

All commit authors signed the Contributor License Agreement.

[ezio-melotti]

LGTM. Can someone on Windows verify that it works as expected?

[lorenzo-delsignore]

I think that renaming the variables of SPHINXBUILD and SPHINXAUTOBUILD with something more readable will need a change of the Makefile of Linux too to be consistent. The problem is that the Makefile use only SPHINXBUILD variable, instead with Windows I only found this solution. In my opinion is better to mantain these two variables in the make.bat file.

[hugovk]

Sure, we can keep the ALLONEWORD ones in this PR. Thanks!

[AA-Turner]

Resolved merge conflicts, given I created them.

A