Add Python 3.12 classifier

Change-Id: I88165b0a9aacda2b6f482b1a2b1f0046247b1e2f
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

setup.cfg

@@ -6,6 +6,7 @@ description_file =
 author = OpenStack
 author_email = openstack-discuss@lists.openstack.org
 home_page = https://docs.openstack.org/openstacksdk/
+python_requires = >=3.7
 classifier =
     Environment :: OpenStack
     Intended Audience :: Information Technology
@@ -19,7 +20,7 @@ classifier =
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
-python_requires = >=3.7
+    Programming Language :: Python :: 3.12
 
 [files]
 packages =

zuul.d/project.yaml

@@ -14,6 +14,7 @@
       - release-notes-jobs-python3
     check:
       jobs:
+        - openstack-tox-py312
         - opendev-buildset-registry
         - nodepool-build-image-siblings:
             voting: false