Possible typo in `directives.py`

[braingram]

sphinx-asdf/sphinx_asdf/directives.py

Lines 210 to 213 in d81d949

	elif shorten:
	rename = schema_id
	return refname, schema_id + fragment

the use of rename was likely meant to be refname. Switching this to refname resulted in asdf and romancal docs build failures so further investigation will be needed.