kolla: Replace Ubuntu 20.04 nodeset with Ubuntu 22.04

Kolla-ansible requires at least Ubuntu 22.04 to work.

Change-Id: I1b77180067df4c0fd09d79048fa66c81422828e8
diff --git a/zuul.d/sp-cinder.yaml b/zuul.d/sp-cinder.yaml
index 25e96f1..6352343 100644
--- a/zuul.d/sp-cinder.yaml
+++ b/zuul.d/sp-cinder.yaml
@@ -236,7 +236,7 @@
     required-projects:
       - opendev.org/openstack/tempest
     timeout: 10800
-    nodeset: ubuntu2004-openstack-multi-node-mixed
+    nodeset: ubuntu2204-openstack-multi-node-mixed
     attempts: 1
     secrets:
       # openstack-client