Shadow another nodeset

Change-Id: I585d14b4a9f5654e9fedaec6f5bfe391c04672df
diff --git a/zuul.d/sp-aaa-shadow.yaml b/zuul.d/sp-aaa-shadow.yaml
index aae27f0..6846d8a 100644
--- a/zuul.d/sp-aaa-shadow.yaml
+++ b/zuul.d/sp-aaa-shadow.yaml
@@ -296,6 +296,16 @@
           - controller
 
 - nodeset:
+    name: devstack-single-node-centos-9-stream
+    nodes:
+      name: controller
+      label: centos-base
+    groups:
+      - name: tempest
+        nodes:
+          - controller
+
+- nodeset:
     name: legacy-centos-7
     nodes:
       name: controller