fix(action): fix outdated dev-dependencies section handling

[catcombo]

I use action-setup-python-poetry in my personal project and I got the following error:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/runner/work/_actions/moneymeets/action-setup-python-poetry/master/action_setup_python_poetry/invalid_package_versions.py", line 34, in main
    if invalid_versions := get_invalid_package_versions(pyproject_path.read_text()):
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runner/work/_actions/moneymeets/action-setup-python-poetry/master/action_setup_python_poetry/invalid_package_versions.py", line 23, in get_invalid_package_versions
    *poetry_data["dev-dependencies"].items(),
     ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
KeyError: 'dev-dependencies'

The reason is that dev-dependencies is no longer used since poetry 1.2. If you create a new pyproject.toml now, it won't contain dev-dependencies section anymore.

[marns93]

👍