Signature Error for arcgis.gis._impl._content_manager.Folder.add in documentation

[cookiedan42]

Describe the bug
add method for Folder object claims to return Future | Job, but returns Job, breaking code which relied on it being a Future

To Reproduce
Steps to reproduce the behavior:

item_folder = folders_obj.get(folder=portal_foldername)
add_job = item_folder.add(item_properties=item_props, file=tempLocalFilePath)

# expect add_job to be a concurrent.futures.Future object
add_job.done()

error:

AttributeError: 'Job' object has no attribute 'done'

Expected behavior
A clear and concise description of what you expected to happen.

Platform (please complete the following information):

• OS: docker arm64
• Python API Version 2.4.1 on python 3.12

Additional context
documentation also does not link to Job object, making using this method challenging to follow

[kgalliher]

Looking into this.