Show that jupyterlite_dir is expected to be a PosixPath object in docs

[matthewfeickert]

Problem

Following scikit-hep/pyhf#2299 I noticed that jupyterlite_dir config option

jupyterlite-sphinx/jupyterlite_sphinx/jupyterlite_sphinx.py

Line 357 in 83663db

jupyterlite_dir = app.env.config.jupyterlite_dir

is expected to be a PosixPath object

jupyterlite-sphinx/jupyterlite_sphinx/jupyterlite_sphinx.py

Lines 247 to 249 in 83663db

	prefix = os.path.relpath(
	os.path.join(self.env.app.srcdir, JUPYTERLITE_DIR), source_location
	)

else it can raise a warning of

WARNING: The config value `jupyterlite_dir' has type `str', defaults to `PosixPath'.

However, in the docs it is show as a str:

jupyterlite-sphinx/docs/configuration.md

Lines 15 to 22 in 83663db

	## JupyterLite dir
	By default, jupyterlite-sphinx runs the `jupyter lite build` command in the docs directory, you can overwrite this behavior and ask jupyterlite to build in a given directory:
	```python
	# Build in the current directory
	jupyterlite_dir = "/path/to/your/lite/dir"
	```

Suggested Improvement

It would be good to avoid warnings at runtime for users, so if the docs can be updated to show usage of a pathlib.Path or os.path object that would be great.

Related: scikit-hep/pyhf#2300

[matthewfeickert]

I guess alternatively it could be converted into a path object in the code if needed, which is probably easier.

[martinRenou]

Thank you for opening an issue.

I guess alternatively it could be converted into a path object in the code if needed

That sounds reasonable indeed. Would you have time for a PR? Happy to give a review

[matthewfeickert]

Resolved by PR #150 as the expected value is changed in jupyterlite-sphinx v0.13.0 from PosixPath to str.