Fixed #32421 -- Made admindocs ModelDetailView show model cached properties.

docs/ref/contrib/admin/admindocs.txt

@@ -55,6 +55,10 @@ system along with all the fields, properties, and methods available on it.
 Relationships to other models appear as hyperlinks. Descriptions are pulled
 from ``help_text`` attributes on fields or from docstrings on model methods.
 
+.. versionchanged:: 4.0
+
+    Older versions don't display model cached properties.
+
 A model with useful documentation might look like this::
 
     class BlogEntry(models.Model):

docs/releases/4.0.txt

@@ -43,6 +43,8 @@ Minor features
 * The admindocs now allows esoteric setups where :setting:`ROOT_URLCONF` is not
   a string.
 
+* The model section of the ``admindocs`` now shows cached properties.
+
 :mod:`django.contrib.auth`
 ~~~~~~~~~~~~~~~~~~~~~~~~~~