Use a 1.31 version that exists

Signed-off-by: James Sturtevant <jsturtevant@gmail.com>

Author: jsturtevant

test/e2e/config/azure-dev.yaml

@@ -208,7 +208,7 @@ variables:
   AKS_KUBERNETES_VERSION_UPGRADE_FROM: "latest-1"
   KUBERNETES_VERSION: "${KUBERNETES_VERSION:-stable-1.32}"
   FLATCAR_KUBERNETES_VERSION: "${FLATCAR_KUBERNETES_VERSION:-stable-1.26}"
-  KUBERNETES_VERSION_API_UPGRADE_FROM: "v1.31.10"
+  KUBERNETES_VERSION_API_UPGRADE_FROM: "v1.31.6"
   FLATCAR_VERSION: "${FLATCAR_VERSION:-latest}"
   ETCD_VERSION_UPGRADE_TO: "3.5.10-0"
   COREDNS_VERSION_UPGRADE_TO: "v1.11.1"