Temporarily disable pytest-checkdocs to avoid race conditions

For the time being, when `setuptools.build_meta` is called,
`egg_info.egg_base` is accidentally set to the project root between the
several calls to the different build hooks.

This means that if the hooks are called, they will try to overwrite
`setuptools.egg-info/PKG-INFO`, and for a very short interval of time it
will be an empty file.

Another process may then try to simultaneously use `importlib.metadata`
to list entry-points. However to sort entry-points, `importlib.metadata`
will try to read the `Name` field in the `PKG-INFO/METADATA` files and
will raise an error/warning if that file is empty.

setup.cfg

@@ -42,7 +42,7 @@ exclude =
 testing =
 	# upstream
 	pytest >= 6
-	pytest-checkdocs >= 2.4
+	# pytest-checkdocs >= 2.4  # temporarily disable it
 	pytest-flake8; \
 		# workaround for tholo/pytest-flake8#87
 		python_version < "3.12"