doc(pyproject): split keywords

keywords should be an array of words/phrases, according to
<https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#keywords>.

Signed-off-by: Kevin Locke <kevin@kevinlocke.name>

Author: kevinoid

pyproject.toml

@@ -101,7 +101,7 @@ classifiers = [
     'Topic :: Software Development',
 ]
 # (Optional) Additional keywords used to assist searching.
-keywords = ['sample setuptools development']
+keywords = ['sample', 'setuptools', 'development']
 requires-python = '>=3.10'
 dynamic = ['version']
 dependencies = [