docs: Update classifiers to match current state.

We dropped support for Django 3.2 and added support for Python 3.11 and
12 in recent PRs but we didn't update the classifiers so doing that
here.

Python Upgarde PR: #333

setup.py

@@ -117,12 +117,13 @@ def is_requirement(line):
     classifiers=[
         'Development Status :: 3 - Alpha',
         'Framework :: Django',
-        'Framework :: Django :: 3.2',
         'Framework :: Django :: 4.2',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)',
         'Natural Language :: English',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.11',
+        'Programming Language :: Python :: 3.12',
     ],
 )