antelope unmaintained

Author: k0ka

.github/workflows/integration_tests.yml

@@ -32,7 +32,7 @@ jobs:
             openstack_version: "stable/2023.2"
             ubuntu_version: "22.04"
           - name: "antelope"
-            openstack_version: "stable/2023.1"
+            openstack_version: "unmaintained/2023.1"
             ubuntu_version: "22.04"
           - name: "zed"
             openstack_version: "unmaintained/zed"