Temporarily pin e2e to v1.25.6

Author: CecileRobertMichon

test/e2e/config/azure-dev.yaml

@@ -149,7 +149,7 @@ providers:
 variables:
   AKS_KUBERNETES_VERSION: "latest"
   AKS_KUBERNETES_VERSION_UPGRADE_FROM: "latest-1"
-  KUBERNETES_VERSION: "${KUBERNETES_VERSION:-stable-1.25}"
+  KUBERNETES_VERSION: "${KUBERNETES_VERSION:-v1.25.6}" # temporary pin to v1.25.6 to workaround windows VM provisioning errors with v1.25.7.
   FLATCAR_KUBERNETES_VERSION: "${FLATCAR_KUBERNETES_VERSION:-stable-1.25}"
   FLATCAR_VERSION: "${FLATCAR_VERSION:-latest}"
   ETCD_VERSION_UPGRADE_TO: "3.5.4-0"