CHANGELOG.md installed into top-level site-packages directory

[vimproved]

Currently, the pyproject.toml file is causing poetry to install CHANGELOG.md top-level into the site-packages directory when built (e.g. /usr/lib/python3.11/site-packages/CHANGELOG.md). See https://projects.gentoo.org/python/guide/qawarn.html#documentation-files-installed-by-poetry for more info. The fix is as follows:

In pyproject.toml, replace include = ["CHANGELOG.md"] with

include = [
    { path = "CHANGELOG.md", format = "sdist" },
]