test: set KUBERNETES_VERSION_LATEST_CI to ci/latest-1.31

Author: cprivitere

test/e2e/config/docker.yaml

@@ -340,7 +340,7 @@ variables:
   KUBERNETES_VERSION: "v1.31.0"
   KUBERNETES_VERSION_UPGRADE_FROM: "v1.30.4"
   KUBERNETES_VERSION_UPGRADE_TO: "v1.31.0"
-  KUBERNETES_VERSION_LATEST_CI: "ci/latest-1.32"
+  KUBERNETES_VERSION_LATEST_CI: "ci/latest-1.31"
   ETCD_VERSION_UPGRADE_TO: "3.5.14-0"
   COREDNS_VERSION_UPGRADE_TO: "v1.11.1"
   DOCKER_SERVICE_DOMAIN: "cluster.local"