Update supported python versions

[korikuzma]

Is your feature request related to a problem? Please describe.
Here the biocommons site says:

We support most recent 3 Python releases; https://devguide.python.org/versions/

3.9, 3.10, 3.11 now
drop 3.9 and add 3.12 when 3.12 is available

Describe the solution you'd like
The following should be changed to use python 3.10, 3.11, and 3.12 since 3.12 is now a supported version:

biocommons.example/pyproject.toml

Lines 12 to 14 in 4b0e4bf

	"Programming Language :: Python :: 3.9",
	"Programming Language :: Python :: 3.10",
	"Programming Language :: Python :: 3.11",

biocommons.example/.github/workflows/python-package.yml

Line 53 in 4b0e4bf

python-version: ["3.9", "3.10", "3.11"]

Describe alternatives you've considered
None

Additional context
None

[github-actions]

This issue is stale because it has been open 90 days with no activity. Remove stale label or comment or this will be closed in 7 days.

[korikuzma]

This has an open PR #42