ci: add py3.12 to tests (#887)

[woile]

Description

Add 3.12 to the python matrix

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Files	Coverage Δ
commitizen/__version__.py	100.00% <100.00%> (ø)
commitizen/bump.py	100.00% <100.00%> (ø)
commitizen/cli.py	94.20% <ø> (ø)
commitizen/commands/bump.py	97.66% <100.00%> (+0.01%)	⬆️
commitizen/commands/commit.py	98.64% <100.00%> (+0.05%)	⬆️
commitizen/config/json_config.py	100.00% <100.00%> (+6.45%)	⬆️
commitizen/config/toml_config.py	100.00% <100.00%> (ø)
commitizen/config/yaml_config.py	100.00% <100.00%> (ø)
commitizen/defaults.py	98.38% <100.00%> (-1.62%)	⬇️
commitizen/providers/__init__.py	100.00% <100.00%> (ø)
... and 9 more

... and 2 files with indirect coverage changes

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