Add a way to use properties on list_display elements

[LeeHanYeong]

In Django admin, you can use the property of the Model, but there is no description in the documentation.
I've added descriptions and examples

[LeeHanYeong]

I have successfully run the make html command locally, but I do not know why the build fails.
I would appreciate your help.

[felixxm]

@LeeHanYeong Using property in the Django admin is described in the paragraph that you're trying to changed. Limitation with @property decorator is also described in this paragraph

... on a property is possible when using the ``property()`` function and not with the
@property decorator.

I don't think that we should add to the documentation workarounds with assigning values to the fget.