DOC: read_json should list `None` for `orient`

[bashtage]

Pandas version checks

• I have checked that the issue still exists on the latest versions of the docs on main here

Location of the documentation

https://pandas.pydata.org/docs/reference/api/pandas.read_json.html

Documentation problem

None is an acceptable type for orient.

Suggested fix for documentation

Add None to the list of acceptable arguments, or maybe just an , optional

[bashtage]

xref pandas-dev/pandas-stubs#226

[ambujpawar]

take