Temporarily disable Python 3.12 wheel building

[djhoese]

Numpy compatibility with 3.12 is a little weird right now. We can't build 3.12 wheels yet.

• Closes #xxxx (remove if there is no corresponding issue, which should only be the case for minor changes)
• Tests added (for all bug fixes or enhancements)
• Tests passed (for all non-documentation changes)
• Passes git diff origin/master **/*py | flake8 --diff (remove if you did not edit any Python files)
• Fully documented (remove if this change should not be visible to users, e.g., if it is an internal clean-up, or if this is part of a larger project that will be documented later)

[codecov]

Codecov Report

Merging #138 (207f9d0) into main (23d43fc) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #138   +/-   ##
=======================================
  Coverage   91.18%   91.18%           
=======================================
  Files          11       11           
  Lines        3847     3847           
=======================================
  Hits         3508     3508           
  Misses        339      339           

Flag	Coverage Δ
unittests	91.18% <ø> (ø)

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[coveralls]

coverage: 91.435%. remained the same when pulling 207f9d0 on ci-312-wheels-off into 23d43fc on main.